A2 Conjunctions & Connectors 15 min read 简单

安排你的行动时间：When, Before, After

这三个词是你的时间小助手，帮你清楚地表达动作的先后顺序：“when” 表示同时或紧接着，“before” 表示之前，“after” 表示之后。
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Grammar Rule in 30 Seconds

Use 'when', 'before', and 'after' to connect two actions and show exactly when they happen in relation to each other.

  • Use 'when' for two things happening at the same time: 'When it rains, I stay home.'
  • Use 'before' for the first action in a sequence: 'Wash your hands before you eat.'
  • Use 'after' for the second action in a sequence: 'I sleep after I finish work.'
Action A + ⏳ (When/Before/After) + Action B

Overview

Ever sent a text that sounded a bit... robotic? Or maybe you’ve been caught in that awkward loop of trying to explain exactly when you’re going to show up to the party.
We use time words like when, before, and after every single day without thinking. They are the glue that holds our schedule together. Without them, your life would just be a list of random actions.
Imagine telling a friend:
I eat dinner. I watch Netflix.
It sounds like you're a robot from a 1980s movie. But add those magic words: "After I eat dinner, I'm going to watch Netflix." Suddenly, you're a human with a plan!
These conjunctions help you connect two different events in time. They tell your listener which thing happens first and which thing follows. Whether you're planning a trip, ordering food, or just chatting about your weekend, these three words are your best friends.
They help you sound natural and keep your stories organized. In this guide, we are looking at how to use them like a native speaker, especially when you're talking about the future—which is where most people get tripped up. Grab a coffee, and let's get your timing perfect.
有没有发过那种读起来有点……像机器人的短信？或者你可能陷入过那种试图解释清楚到底什么时候会出现在派对上的尴尬循环。我们每天都在无意识地使用像 when、before 和 after 这样的时间词。它们是把我们的日程安排粘合在一起的胶水。没有它们，你的生活就像是一堆随机动作的列表。想象一下跟朋友说：“I eat dinner. I watch Netflix.” 听起来就像你是 80 年代电影里的机器人。但加上那些神奇的词：“After I eat dinner, I'm going to watch Netflix.” 突然间，你就是一个有计划的人类了！这些连词帮你把两个不同时间发生的事件连接起来。它们告诉听者哪件事先发生，哪件事紧随其后。无论你是在计划旅行、点餐，还是仅仅聊聊周末，这三个词都是你最好的朋友。它们帮你听起来更自然，让你的故事更有条理。在本指南中，我们将看看如何像母语者一样使用它们，特别是当你谈论未来的时候——这也是大多数人容易犯错的地方。倒杯咖啡，让我们来搞定你的时间表达吧。
At its heart, this grammar rule is about sequencing. We use when, before, and after to link two parts of a sentence. One part is the 'time clause' (the part with the time word) and the other is the 'main clause' (the main thing that happens).
Think of the time clause as the trigger and the main clause as the result. For example, when usually means two things happen at the same time or one happens immediately after another. If you say, "I'll text you when I get home," getting home is the trigger for the text.
Before and after are even more specific. They act like a timeline in your head. Before tells us that the main action happens first in the sequence of your intent, even if it appears later in the sentence.
After does the opposite. It shows that the main action is the second step. In English, we use these to talk about the past (
Before I moved here, I lived in London
) and the future ("I'll call you after I finish my workout").
Since you're at an A2 level, you probably already know how to talk about the past. The real challenge—and the real power—is using these for your future plans. It’s the difference between sounding like a textbook and sounding like a pro on a Zoom call.
本质上，这条语法规则是关于顺序的。我们用 when、before 和 after 来连接句子的两个部分。一部分是“时间从句”（带有时间词的部分），另一部分是“主句”（发生的主要事情）。把时间从句想象成触发器，把主句想象成结果。比如，when 通常意味着两件事同时发生，或者一件紧接着另一件发生。如果你说，“I'll text you when I get home”，回到家就是发短信的触发器。Before 和 after 就更具体了。它们就像你脑海中的时间轴。Before 告诉我们主要动作在你的意图顺序中是先发生的，即使它在句子中出现得比较晚。After 则相反。它表明主要动作是第二步。在英语中，我们用这些词来谈论过去（“Before I moved here, I lived in London”）和未来（“I'll call you after I finish my workout”）。既然你已经达到 A2 水平，你可能已经知道如何谈论过去了。真正的挑战——也是真正的威力所在——是在谈论未来计划时使用它们。这就是听起来像教科书和在 Zoom 通话中听起来像高手之间的区别。

How This Grammar Works

The most important thing to understand is that these words create a relationship. They are like traffic lights for your sentences. They tell the listener: "Stop!
Wait for this first event before you think about the second one." Interestingly, the order of the sentence doesn't always change the meaning, but it does change the punctuation. You can put the time clause at the beginning: "After I finish this video, I'll go to bed.
Or you can put it at the end:
I'll go to bed after I finish this video." Both are perfectly fine! Native speakers switch these around depending on what they want to emphasize.
If you're really excited about the video, you might start with that. If you're exhausted and just want to sleep, you'll start with "I'll go to bed." Another cool thing? These words don't just work with verbs.
You can use them with nouns too, like
before dinner
or
after work.
But when we use them with full actions (verbs), that's when the grammar gets interesting. You're building a bridge between two ideas. One side of the bridge is the when and the other side is the what. If the bridge is broken, your friends won't know if you're calling them now, later, or never.
Keep that bridge strong!
最重要的是要理解这些词创造了一种关系。它们就像你句子的红绿灯。它们告诉听者：“停！先等这件事发生，再去想第二件事。”有趣的是，句子的顺序并不总是改变意思，但它确实会改变标点符号。你可以把时间从句放在开头：“After I finish this video, I'll go to bed.” 或者你可以把它放在结尾：“I'll go to bed after I finish this video.” 两种都完全没问题！母语者会根据想要强调的内容来互换位置。如果你对视频真的很兴奋，你可能会先说那个。如果你累坏了只想睡觉，你会先说“I'll go to bed”。还有个很酷的点？这些词不仅仅适用于动词。你也可以把它们和名词一起用，比如“before dinner”或“after work”。但当我们把它们和完整的动作（动词）一起用时，语法就变得有趣了。你在两个想法之间架起了一座桥梁。桥的一端是“什么时候”，另一端是“什么事”。如果桥断了，你的朋友就不知道你是现在打给他们，还是稍后打，或者永远不打。保持桥梁坚固！

Formation Pattern

1
Let’s get into the nitty-gritty of how to build these sentences. There is one golden rule you must memorize: No will in the time clause. Even if you are talking about tomorrow, next week, or the year 2050, the verb right after when, before, or after stays in the Present Simple. It feels weird at first, I know. Your brain wants to say
When I will arrive,
but your mouth needs to say When I arrive.
2
让我们深入了解一下如何构建这些句子的细节。你必须记住一条黄金法则：时间从句中不能用 will。 即使你在谈论明天、下周或者是 2050 年，紧跟在 when、before 或 after 后面的动词都要保持在 Present Simple（一般现在时）。我知道，这一开始感觉很怪。你的脑子想说“When I will arrive”，但你的嘴巴必须说“When I arrive”。
3
Start with your Time Word: When, Before, or After.
4
Add the first action using the Present Simple: I finish work.
5
Add a comma if you started with the time word.
6
Add your Main Action using the Future (will or be going to): I will call you.
7
从你的时间词开始：When、Before 或 After。
8
用 Present Simple 加上第一个动作：I finish work。
9
如果你以时间词开头，加一个逗号。
10
用 Future（will 或 be going to）加上你的主要动作：I will call you。
11
Sentence:
When I finish work, I will call you.
12
句子：“When I finish work, I will call you.”
13
If you flip it around, the pattern looks like this:
14
Main Action (Future): I will call you.
15
Time Word: when.
16
Second Action (Present Simple): I finish work.
17
如果你把它反过来，模式是这样的：
18
主要动作（Future）：I will call you。
19
时间词：when。
20
第二个动作（Present Simple）：I finish work。
21
Sentence:
I will call you when I finish work.
22
句子：“I will call you when I finish work.”
23
Notice how the comma disappears when the time word is in the middle? It’s like the time word acts as its own punctuation.
24
注意到当时间词在中间时逗号是怎么消失的吗？就像时间词充当了自己的标点符号。

Conjugation Table

Subject Time Clause (Present Simple) Main Clause (Future)
I when I arrive I will call you
You before you leave you will see him
He/She after she eats she will feel better
We when we start we will be happy
They after they finish they will go home
Subject（主语） Time Clause (Present Simple)（时间从句） Main Clause (Future)（主句）
I when I arrive I will call you
You before you leave you will see him
He/She after she eats she will feel better
We when we start we will be happy
They after they finish they will go home

When To Use It

You’ll use this pattern constantly in modern life. Think about your daily routine. You’re on your phone, you’re planning with friends, or you’re at work.
在现代生活中你会不断用到这个句型。想想你的日常生活。你在玩手机，你在和朋友做计划，或者你在工作。
  • Travel & Commuting: "I'll buy the tickets before the price goes up. or When the bus arrives, I'll send you a live location."
  • Social Media & Gaming: "I'm going to post the photo after I edit it. or When the new season drops, I'll be online all night."
  • Food & Shopping:
    Before I order the pizza, do you want toppings?
    or "I'll pay you back after I get my paycheck."
  • 旅行 & 通勤： “I'll buy the tickets before the price goes up.” 或者 “When the bus arrives, I'll send you a live location.”
  • 社交媒体 & 游戏： “I'm going to post the photo after I edit it.” 或者 “When the new season drops, I'll be online all night.”
  • 美食 & 购物： “Before I order the pizza, do you want toppings?” 或者 “I'll pay you back after I get my paycheck.”
We use when for things we are sure will happen. It’s a certain event. Use before when one thing needs to be finished first (the priority).
Use after when you’re describing a sequence or a result. It’s also very common in work emails.
I will send the report after the manager reviews it.
It sounds professional and clear.
In casual speech, we often shorten I will to "I'll,
making it sound even more natural.
I'll tell you when I'm ready.
If you use this correctly, you’ll sound like you’ve been living in an English-speaking country for years. It’s one of those
secret" markers of a high-level A2 speaker.
我们用 when 表示我们确定会发生的事情。这是一个确定的事件。当一件事需要先完成（优先级）时，用 before。当你在描述顺序或结果时，用 after。这在工作邮件中也非常常见。“I will send the report after the manager reviews it.” 这听起来既专业又清晰。在随意交谈中，我们经常把“I will”缩写为“I'll”，这样听起来更自然。“I'll tell you when I'm ready.” 如果你用得对，你听起来就像在英语国家生活了好几年一样。这是高水平 A2 说话者的“秘密”标志之一。

Common Mistakes

The biggest mistake—the one that makes English teachers cry—is putting will in both parts of the sentence.
  • ✗ Wrong:
    I will call you when I will arrive.
  • ✓ Correct:
    I will call you when I arrive.
Think of the time word as a will-free zone. As soon as you say when, before, or after, you have to leave the word will at the door. Another common slip-up is the third-person 's'. Because we use the Present Simple in the time clause, you have to remember your basic conjugation rules.
  • ✗ Wrong:
    After he finish his coffee, he will leave.
  • ✓ Correct:
    After he finishes his coffee, he will leave.
Don't forget that little 's'! It’s a tiny sound, but it makes a huge difference. Punctuation is another area where people stumble. If you start with the time word, you need a comma to give your listener a tiny breath. Without it, the sentence runs together like a fast-talking TikToker. Lastly, don't confuse when with if. When means you are sure it's happening. If means maybe. If you say
When I win the lottery,
you are very optimistic! Most people should say
If I win the lottery.
最大的错误——那个会让英语老师哭出来的错误——就是在句子的两个部分都用 will。
  • ✗ 错:
    I will call you when I will arrive.
  • ✓ 对:
    I will call you when I arrive.
把时间词想象成一个“will 禁区”。一旦你说了 when、before 或 after，你就得把单词 will 拒之门外。另一个常见的失误是第三人称的 's'。因为我们在时间从句中使用 Present Simple，你必须记住基本的变位规则。
  • ✗ 错:
    After he finish his coffee, he will leave.
  • ✓ 对:
    After he finishes his coffee, he will leave.
别忘了那个小小的 's'！声音虽小，区别很大。标点符号是人们容易跌倒的另一个地方。如果你以时间词开头，你需要一个逗号让听者稍微喘口气。没有它，句子就会像语速飞快的 TikTok 博主一样连在一起。最后，别把 when 和 if 搞混了。When 意味着你确定它会发生。If 意味着也许。如果你说 “When I win the lottery”，那你真是太乐观了！大多数人应该说 “If I win the lottery”。

Contrast With Similar Patterns

You might be thinking,
Wait, what about until or as soon as?
These are like the cousins of our time conjunctions. As soon as is like when on an energy drink. It means immediately after. For example: "I'll call you as soon as I land." It’s more urgent than just saying when.
Until is about the duration of time. "I'll wait until you arrive." This means the action of waiting stops at the moment you show up.
你可能会想，“等等，那 until 或 as soon as 呢？”这些就像是我们时间连词的表亲。As soon as 就像是喝了能量饮料的 when。它的意思是“紧接在……之后”。比如：“I'll call you as soon as I land.” 这比只说 when 更紧迫。Until 是关于持续时间的。“I'll wait until you arrive.” 这意味着等待的动作在你出现的那一刻停止。
Our three stars (when, before, after) are the foundations. When is the general connector. Before is the "don't forget this first" word.
After is the sequence word. Compared to while, which we use for two things happening at the exact same time (
I listen to music while I study
), when, before, and after are much more focused on the *order* of events.
我们的三位明星（when、before、after）是基础。When 是通用的连接词。Before 是“别忘了先做这个”的词。After 是“顺序”词。相比于 while——我们用它来表示两件事在完全相同的时间发生（“I listen to music while I study”）——when、before 和 after 更侧重于事件的顺序。
Also, watch out for the difference between after and afterwards. After is a conjunction—it needs a verb or noun following it immediately (
After lunch...
). Afterwards is an adverb and usually stands alone at the end or beginning of a sentence ("We ate lunch.
Afterwards, we went for a walk.
). If you try to say
Afterwards I finish..." it will sound very strange to a native speaker. Stick to the simple ones first!
另外，要注意 after 和 afterwards 的区别。After 是个连词——它后面需要紧跟着动词或名词（“After lunch...”）。Afterwards 是副词，通常单独放在句尾或句首（“We ate lunch. Afterwards, we went for a walk.”）。如果你试着说 “Afterwards I finish...”，在母语者听起来会非常奇怪。先坚持用简单的吧！

Quick FAQ

Q

Can I use the past tense with these words?

Absolutely!

When I was a kid, I played soccer.
The no will rule only applies when you are talking about the *future*.

Q

Do I always need a comma?

Only if the time word (when/before/after) starts the sentence. If it's in the middle, no comma needed. It’s like a visual break for the reader.

Q

Is it

After I go
or
After going
?

At A2, stick to

After I go.
After going
is also correct, but it’s a bit more advanced (using a gerund). Both work, but the full sentence is safer for now!

Q

Can I say

When I am going to arrive
?

Technically yes, but it’s very clunky. Native speakers almost always use the Present Simple:

When I arrive.
It's shorter, faster, and much more natural for texting and talking.

Q

What if I forget the 's' for he/she/it?

People will still understand you, but you'll sound a bit like a beginner. Try to catch yourself! It’s the present simple part that’s key.

Q

我可以用过去时态搭配这些词吗？

当然可以！“When I was a kid, I played soccer.” “不使用 will”的规则只适用于你谈论未来的时候。

Q

我总是需要逗号吗？

只有当时间词（when/before/after）作为句子开头时才需要。如果它在中间，就不需要逗号。这就像是给读者的视觉休息。

Q

是说 “After I go” 还是 “After going”？

在 A2 阶段，坚持用 “After I go”。“After going” 也是对的，但稍微高级一点（使用了动名词）。两种都可以，但目前来说完整的句子更保险！

Q

我可以说 “When I am going to arrive” 吗？

技术上是可以，但非常笨拙。母语者几乎总是使用 Present Simple：“When I arrive”。这样更短、更快，发短信和说话时也更自然。

Q

如果我忘了 he/she/it 的 's' 怎么办？

人们还是能听懂你的意思，但你听起来会有点像初学者。试着提醒自己！重点在于 “present simple” 这部分。

Tense Agreement with Time Conjunctions

Timeframe Time Clause Tense Main Clause Tense Example
Routine
Present Simple
Present Simple
I eat before I work.
Past Event
Past Simple
Past Simple
I ate after I worked.
Future Plan
Present Simple
Future (Will)
I will eat when I arrive.
General Truth
Present Simple
Present Simple
When it rains, it gets wet.

Reduced Time Clauses (Intermediate/Advanced)

Full Form Reduced Form Note
After I finished...
After finishing...
Subject must be the same
Before you leave...
Before leaving...
Common in instructions
When I am at work...
When at work...
Omits 'Subject + be'

Meanings

Temporal conjunctions are words used to connect two clauses (parts of a sentence) to indicate the chronological order or simultaneous nature of events.

1

Simultaneous or Immediate Sequence

Using 'when' to show that one event happens at the same time as another, or immediately after it.

“When the bell rings, the class starts.”

“I felt happy when I saw my test results.”

2

Prior Action

Using 'before' to indicate that the action in the main clause happens earlier than the action in the 'before' clause.

“Check your bag before you leave the house.”

“I always drink water before I go for a run.”

3

Subsequent Action

Using 'after' to indicate that the action in the main clause happens later than the action in the 'after' clause.

“After I finish my homework, I will play video games.”

“We went for a walk after the rain stopped.”

Reference Table

Reference table for 安排你的行动时间：When, Before, After
连接词 含义 将来时例句 过去时例句 逗号规则
when
同时发生 / 紧接着发生
When I arrive, I'll call you.
When I called, she answered.
是，如果从句在句首
before
在此动作之前
Before you leave, close the window.
She ate before she left.
是，如果从句在句首
after
在此动作之后
After I finish, I'll go out.
He slept after he ate.
是，如果从句在句首

正式程度

正式
I shall contact you upon my arrival.

I shall contact you upon my arrival. (Travel communication)

中性
I will call you when I arrive.

I will call you when I arrive. (Travel communication)

非正式
I'll buzz ya when I'm there.

I'll buzz ya when I'm there. (Travel communication)

俚语
Hit me up when u land.

Hit me up when u land. (Travel communication)

动作时间排序：When, Before, After

连接动作时间

When

  • 同时发生 At the same time
  • 紧接着发生 As soon as
  • 将来事件 Present tense in 'when' clause

Before

  • 先前动作 Prior to
  • 指示 Do this first
  • 名词/动名词 Before lunch, Before leaving

After

  • 随后动作 Following
  • 结果 Then this happened
  • 名词/动名词 After work, After eating

When, Before, After：一览

When
时间 Same time or immediately after
将来时 Present Simple in 'when' clause
例句 When I finish, I'll call.
Before
时间 One action precedes another
用法 Instructions, sequencing
例句 Wash hands before eating.
After
时间 One action follows another
用法 Sequencing, results
例句 Eat after you cook.

选择正确的时间连接词

1

两个动作是同时发生，还是一个紧接着另一个发生？

YES
使用 `when` (例如，`When the phone rang, I answered.`)
NO
进入下一个问题。
2

一个动作发生在另一个动作 *之前* 吗？

YES
使用 `before` (例如，`Brush your teeth before bed.`)
NO
进入下一个问题。
3

一个动作发生在另一个动作 *之后* 吗？

YES
使用 `after` (例如，`I'll relax after work.`)
NO
重新评估时间关系！

上下文中的时间连接词

⏰

日常习惯

  • • I drink coffee after I wake up.
  • • Before I leave, I check my keys.
📅

将来计划

  • • When I get home, I'll call you.
  • • Let's meet after class.
🗓️

过去事件

  • • She laughed when she heard the joke.
  • • He left before I arrived.
📝

指示

  • • Wash hands before you eat.
  • • Close the app after you save.
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按水平分级的例句

1

I wash my hands before I eat.

Me lavo las manos antes de comer.

2

After dinner, I watch TV.

Después de la cena, veo la televisión.

3

When I am sad, I cry.

Cuando estoy triste, lloro.

4

I go home when the work is finished.

Me voy a casa cuando el trabajo termina.

1

Before you go to bed, turn off the lights.

Antes de irte a la cama, apaga las luces.

2

I felt very tired after I ran five kilometers.

Me sentí muy cansado después de correr cinco kilómetros.

3

When the taxi arrives, please tell me.

Cuando llegue el taxi, por favor dímelo.

4

We need to buy tickets before we enter the museum.

Necesitamos comprar boletos antes de entrar al museo.

1

I had already finished the report when my boss asked for it.

Ya había terminado el informe cuando mi jefe lo pidió.

2

After living in London for a year, her English improved.

Después de vivir en Londres por un año, su inglés mejoró.

3

Make sure you save the file before closing the program.

Asegúrate de guardar el archivo antes de cerrar el programa.

4

When I was traveling in Japan, I ate sushi every day.

Cuando estaba viajando por Japón, comía sushi todos los días.

1

The match was cancelled when it started to pour with rain.

El partido fue cancelado cuando empezó a llover a cántaros.

2

Before making a decision, we should consider all the options.

Antes de tomar una decisión, deberíamos considerar todas las opciones.

3

After having studied all night, he was exhausted during the exam.

Después de haber estudiado toda la noche, estaba agotado durante el examen.

4

When confronted with the evidence, he admitted his mistake.

Al ser confrontado con la evidencia, admitió su error.

1

Hardly had I stepped outside when it began to snow.

Apenas había salido cuando empezó a nevar.

2

Before long, the small startup had grown into a global corporation.

En poco tiempo, la pequeña startup se había convertido en una corporación global.

3

After what seemed like an eternity, the results were finally announced.

Después de lo que pareció una eternidad, los resultados fueron finalmente anunciados.

4

When viewed from this perspective, the problem is quite simple.

Visto desde esta perspectiva, el problema es bastante simple.

1

The bill was passed only after much deliberation and heated debate.

El proyecto de ley fue aprobado solo después de mucha deliberación y debate acalorado.

2

Before the advent of the internet, information was much harder to access.

Antes del advenimiento de internet, la información era mucho más difícil de acceder.

3

When all is said and done, the project was a resounding success.

Al fin y al cabo, el proyecto fue un éxito rotundo.

4

He was named after his grandfather, a tradition common in his family.

Le pusieron el nombre de su abuelo, una tradición común en su familia.

容易混淆

Timing Your Actions: When, Before, After 对比 When vs. While

Both relate to time, but 'while' is for long actions.

Timing Your Actions: When, Before, After 对比 After vs. Afterwards

'After' is a conjunction; 'afterwards' is an adverb.

常见错误

✗

I eat after go home.

✓

I eat after I go home.

You need a subject (I) after the conjunction.
✗

Before I eat I wash hands.

✓

Before I eat, I wash my hands.

Missing comma after the first clause.
✗

I will call you when I will arrive.

✓

I will call you when I arrive.

Do not use 'will' inside the time clause.
✗

I cook after I eat.

✓

I eat after I cook.

Confusing the logical sequence of events.
✗

After to finish work, I went home.

✓

After finishing work, I went home.

Use the gerund (-ing), not the infinitive, after 'after' as a preposition.
✗

Hardly I had arrived when it rained.

✓

Hardly had I arrived when it rained.

Inversion is required with negative/restrictive time expressions at the start.

句型

When ___, I ___.

I will ___ after I ___.

Real World Usage

Cooking a Recipe very common

Add the salt after the water boils.

Job Interview common

Before I joined Google, I worked at a startup.

GPS Navigation constant

When you reach the roundabout, take the second exit.

Social Media Captions very common

Me when I finally finish my exams.

Doctor's Appointment occasional

Take this medicine before you eat breakfast.

Airport Announcements common

Please have your passport ready before you reach the gate.

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💡

逗号小贴士！

想象你写一封邮件，如果when, before, after引导的句子放在句首，就像给你的读者一个“小停顿”信号，需要加逗号。如果它在句中，就不需要逗号啦！“When I finish work, I'll go home.” vs. “I'll go home when I finish work.”
⚠️

时间状语从句里没有“will”！

这个很重要！当你用when, before, after谈论将来发生的事情时，在这些词引导的从句里，千万不要用“will”！要用一般现在时。比如，“When I arrive,” 而不是 “When I will arrive.”
🎯

动名词的魔力！

如果两个动作的主语是同一个人，你可以直接在before或after后面加上动名词（-ing形式），这样更简洁！比如，“Before eating, wash your hands.” 或者 “After finishing work, I go to the gym.”
🌍

清晰表达最重要！

在英语文化中，清晰地表达时间顺序非常受重视。正确使用这些连接词，能让你的表达更有条理、更清晰，无论是面试还是讲故事都很有用！“Before I started this project, I gained experience in...”
💡

听听语感！

多听英语母语者在电影、播客或日常对话中是如何使用这些词的。你会很快培养出正确的语感和自然的表达方式。这就像学习语言的节奏一样！“What do you do when you feel tired?”

Smart Tips

Start your sentences with 'Before' or 'After' to make the steps very clear.

Click save. Then close the window. → Before you close the window, click save.

Check if you used 'will' after 'when'. If yes, delete it!

I'll be happy when I will see you. → I'll be happy when I see you.

Use the -ing form after 'before' and 'after' when the subject is the same.

After I finished the book, I went to bed. → After finishing the book, I went to bed.

Read the sentence aloud. If you naturally pause in the middle, you probably need a comma there.

When I arrive I will call. → When I arrive, I will call.

发音

/wɛn/

The 'When' Wh- sound

In most modern dialects, 'when' is pronounced with a simple /w/ sound, identical to 'wen'.

I EAT before I WORK.

Sentence Stress

The stress usually falls on the main verbs, not the conjunctions.

Comma Pause

Before I eat [pause], I wash my hands.

A slight rise in pitch before the comma indicates the sentence is not finished.

记住它

记忆技巧

B-A-W: Before (1st), After (2nd), When (Same time).

视觉联想

Imagine a train track. 'Before' is the engine, 'After' is the caboose, and 'When' is two trains passing each other at the station.

Rhyme

Before you go, let me know. After you arrive, stay alive. When we meet, it's a treat!

Story

I woke up. BEFORE I brushed my teeth, I drank water. AFTER I brushed my teeth, I felt fresh. WHEN I looked in the mirror, I smiled.

Word Web

whenbeforeaftersequencetimelinecommaclause

挑战

Write three sentences about your morning routine using each word once. Check your commas!

文化笔记

British speakers often use 'just' with 'when' to emphasize immediacy: 'I had just arrived when it started raining.'

In casual US speech, 'after' is sometimes replaced by 'once': 'Once I finish, I'll come over.'

In business, 'before' is often replaced by 'prior to' for a more formal tone.

Old English 'hwanne' (when), 'be-foran' (before), and 'æfter' (after).

对话开场白

“

What do you usually do after you wake up?

“

What will you do when you finish this lesson?

“

Tell me about a time you were surprised when you opened a gift.

日记主题

Describe your perfect morning using 'before', 'after', and 'when'.
Write about a travel experience. What happened when you arrived?

常见错误

Incorrect

正确

Incorrect

正确

Incorrect

正确

Incorrect

正确

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Test Yourself

选择最合适的连接词来完成句子。

Please turn off the lights ___ you leave the room.

✓ Correct! ✗ Not quite. Correct answer: before
你在离开之前关灯，所以“before”是正确的选择。
哪个句子正确表达了将来动作？ 多项选择

Choose the correct sentence:

✓ Correct! ✗ Not quite. Correct answer: When I finish my homework, I will watch TV.
对于将来事件，“when”引导的从句使用一般现在时（'finish'），主句使用将来时（'will watch'）。
找出并改正句子中的错误。 Error Correction

Find and fix the mistake:

She always eats breakfast after she will wake up.

✓ Correct! ✗ Not quite. Correct answer: She always eats breakfast after she wakes up.
描述一个日常习惯时，两个从句都使用一般现在时。“will wake up”在这里是错误的。

Score: /3

练习题

8 exercises
Choose the correct word to complete the sentence. 多项选择

I always brush my teeth ___ I go to bed.

✓ Correct! ✗ Not quite. Correct answer: before
Brushing teeth happens first in the nightly routine.
Fix the mistake in the sentence. Error Correction

Find and fix the mistake:

I will call you when I will arrive home.

✓ Correct! ✗ Not quite. Correct answer: I will call you when I arrive home.
We use the present simple after 'when' for future events.
Fill in the blank with 'when', 'before', or 'after'.

___ it rains, the grass gets wet.

✓ Correct! ✗ Not quite. Correct answer: When
'When' is used for general truths and simultaneous events.
Put the words in the correct order. Sentence Reorder

after / I / work / go / I / gym / the / finish / to

✓ Correct! ✗ Not quite. Correct answer: After I finish work, I go to the gym.
The logical sequence is finishing work first, then going to the gym.
Match the beginning of the sentence to the end. Match Pairs

1. Before I sleep... / 2. After I wake up... / 3. When it's cold...

✓ Correct! ✗ Not quite. Correct answer: 1-I read, 2-I drink coffee, 3-I wear a coat
These matches follow logical daily routines.
Which sentence needs a comma? 多项选择

Identify the sentence that requires a comma.

✓ Correct! ✗ Not quite. Correct answer: Before you leave tell me.
Sentences starting with a time conjunction need a comma.
Complete the instruction.

Turn off the oven ___ the cake is finished.

✓ Correct! ✗ Not quite. Correct answer: when
The action should happen at the moment the cake is done.
Correct the sequence. Error Correction

Find and fix the mistake:

I put on my shoes after I put on my socks.

✓ Correct! ✗ Not quite. Correct answer: No change needed.
The original sentence is logically correct.

Score: /8

Practice Bank

12 exercises
用最合适的连接词完成句子。 填空

I felt much better ___ I took the medicine.

✓ Correct! ✗ Not quite. Correct answer: after
选择逗号使用正确的句子。 多项选择

Which sentence uses the comma correctly?

✓ Correct! ✗ Not quite. Correct answer: Before the movie started, we bought popcorn.
找出并改正语法错误。 Error Correction

He will call you when he will arrive.

✓ Correct! ✗ Not quite. Correct answer: He will call you when he arrives.
将句子翻译成英文。 翻译

Translate: 'Llamaré a mi madre después de que termine mi trabajo.'

✓ Correct! ✗ Not quite. Correct answer: ["I will call my mother after I finish my work.","I'll call my mother after I finish my work."]
将这些词语按正确顺序排列成一个句子。 Sentence Reorder

Arrange these words into a sentence:

✓ Correct! ✗ Not quite. Correct answer: Make sure the door is locked before you leave.
将句子的前半部分与正确的后半部分匹配。 Match Pairs

Match the sentence halves:

✓ Correct! ✗ Not quite. Correct answer: matched
选择正确的连接词。 填空

Always brush your teeth ___ you go to bed.

✓ Correct! ✗ Not quite. Correct answer: before
哪个句子语法正确？ 多项选择

Select the correct sentence:

✓ Correct! ✗ Not quite. Correct answer: When I was young, I played outside.
改正句子中的错误。 Error Correction

Don't talk before you think.

✓ Correct! ✗ Not quite. Correct answer: Don't think before you talk.
翻译成英文。 翻译

Translate: 'Cuando llueve, leo un libro.'

✓ Correct! ✗ Not quite. Correct answer: ["When it rains, I read a book.","When it rains I read a book."]
重新排列单词以组成一个有意义的句子。 Sentence Reorder

Arrange these words into a sentence:

✓ Correct! ✗ Not quite. Correct answer: I'll tell you when the pizza arrives.
选择正确的词。 填空

She decided to review her notes ___ the exam.

✓ Correct! ✗ Not quite. Correct answer: before

Score: /12

常见问题 (8)

Yes, but use the present simple tense in the 'when' clause. Example: `When I see him, I'll tell him.`

`After` is a conjunction (needs a clause: After I eat...), while `afterwards` is an adverb (I ate, and afterwards I slept).

Only if `before` starts the sentence. `Before I go, I'll call.` vs `I'll call before I go.`

Yes! `After eating` is a shorter, more natural way to say `After I eat` if the subject is the same.

`When` implies certainty (it will happen), while `if` implies a possibility (it might happen).

Absolutely. It is very common in storytelling and instructions. Just remember the comma!

In English, conjunctions like `before` and `after` are followed by a clause (subject + verb) or a gerund (-ing), never an infinitive.

`Whenever` means 'at any time that' or 'every time that', whereas `when` usually refers to a specific time.

Scaffolded Practice

1

1

2

2

3

3

4

4

Mastery Progress

Needs Practice

Improving

Strong

Mastered

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In Other Languages

Spanish moderate

cuando, antes de, después de

English does not use the subjunctive in future time clauses.

Japanese low

とき (toki), まえに (mae ni), あとで (ato de)

Word order is reversed compared to English.

German high

wenn/als, bevor, nachdem

German has two words for 'when' depending on the tense/frequency.

French moderate

quand, avant, après

French uses future tense in time clauses; English uses present.

Arabic moderate

عندما (indama), قبل (qabla), بعد (ba'da)

Arabic conjunctions can change form based on the following noun or verb.

Chinese low

的时候 (de shihou), 以前 (yiqian), 以后 (yihou)

Chinese uses post-positions for time, while English uses pre-positions/conjunctions.

Learning Path

Prerequisites

Previous
理清思路：然后、接下来、最后 (Then, Next, Finally)
Next
提问'How'（多少，多少个，多久，多长时间，多大）

Continue With

B1 Requires

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