B1 · متوسط فصل 13

چطور مثل یه حرفه‌ای نصیحت کنیم و دستور بدیم؟

4 مجموع قواعد
48 مثال‌ها
6 دقیقه

Chapter in 30 Seconds

Master the art of giving helpful advice and clear instructions with confidence.

  • Suggest better choices using the modal verb should.
  • Express non-negotiable rules and necessities using must.
  • Link specific conditions to advice and direct commands.
Command the room and guide others with precision.

چی یاد می‌گیری

سلام! آماده‌ای که یه لول بیای بالا و دیگه فقط جمله‌های ساده نگی؟ توی این فصل قراره یاد بگیری چطور خیلی محترمانه نصیحت کنی یا حتی اگه لازم شد، با قاطعیت به بقیه دستور بدی. اول از همه میریم سراغ should که خوراکِ پیشنهاد دادن و نصیحت‌های دوستانه‌ست؛ مثلاً وقتی رفیقت خسته‌ست و بهش می‌گی «باید یه کم استراحت کنی». بعدش با must آشنا میشی تا بتونی وظایف و اجبارهای جدی رو با قدرت بیان کنی، مثل وقتی که داری قوانین یه محیط کار یا یه بازی رو توضیح می‌دی. اما بخش باحال‌تر اینجاست که یاد می‌گیری چطور این‌ها رو با جملات شرطی ترکیب کنی. یعنی یاد می‌گیری با استفاده از If و جملات امری، دستورالعمل‌های دقیق بدی؛ مثلاً: «اگه بارون اومد، حتماً چتر ببر!» یا «اگه سوالی داشتی، حتماً از من بپرس». تصور کن توی یه شرکت بین‌المللی هستی یا داری به یه دوست خارجی آدرس میدی؛ این مهارت‌ها دقیقاً همون چیزیه که به کلامت اعتبار و وضوح میده. آخر این فصل، تو دیگه لنگ نمی‌مونی و می‌تونی خیلی راحت بین یه پیشنهاد دوستانه و یه دستور جدی تفکیک قائل بشی و منظورت رو دقیقاً همون‌طور که هست برسونی. بزن بریم!

Learning Objectives

By the end of this chapter, you will be able to:

  1. 1
    By the end you will be able to offer polite recommendations for common problems using should.
  2. 2
    By the end you will be able to state firm legal or personal requirements using must.
  3. 3
    By the end you will be able to construct complex conditional sentences to give advice based on specific situations.

راهنمای فصل

مرور کلی

As you continue your journey in B1 English grammar, you’re building the skills to connect with people and express yourself clearly in a wide range of situations. This chapter is all about giving effective English rules, advice, and instructions. Imagine being able to help a friend, offer clear guidance, or explain important steps without sounding aggressive or unclear.
That's exactly what you'll learn here!
We'll dive into the subtle art of using words like should to offer helpful recommendations, like
You should try that new cafe.
You'll also master must for those times when something is truly essential, as in
You must submit your report by Friday.
We’ll also explore how to combine these with the first conditional – using if clauses to give advice and commands that are relevant to specific situations, such as
If you want to pass the exam, you should study every day
or
If you see a problem, tell your manager immediately.
By the end, you'll be confidently guiding others and understanding important directions like a native speaker.

این گرامر چطور کار می‌کنه

Learning to give and understand rules, advice, and instructions effectively makes your English sound much more natural and confident. Let's explore how these pieces fit together, moving from gentle suggestions to strong directives.
First, for friendly advice and recommendations, we use should. This is your go-to for suggesting the best course of action without being too strong or bossy. For example,
You should drink more water
or
They should call their parents more often.
It implies a good idea, but the choice is still up to the listener.
When something is absolutely essential, a strong obligation, or a logical necessity, we use must. This isn't a suggestion; it's a rule, a requirement, or something that is highly certain. Think of signs like
All visitors must check in at reception
or personal vows like
I must finish this project tonight.
If there’s no other option, or the consequences of not doing it are serious, must is the word.
Now, let's add a condition! The first conditional for advice (should) combines a possible future situation with advice. The structure is simple: If + present simple, should + base verb.
This allows you to give advice that is specific and relevant to a particular scenario. For instance,
If you feel tired, you should take a break
or
If it rains tomorrow, we should bring umbrellas.
This makes your advice more practical and targeted.
Finally, we have the first conditional for commands & advice (If + Imperative). Here, instead of using should, you give a direct command or instruction in the second part of the sentence. The structure is: If + present simple, imperative (base verb form).
For example,
If you arrive late, wait outside
or
If you have any questions, ask the teacher.
This is perfect for giving clear, actionable instructions based on a potential future event. These structures together give you a powerful toolkit for guiding conversations and ensuring clarity in your interactions.

اشتباهات رایج

It's easy to mix up these useful phrases. Here are some common pitfalls and how to avoid them:
  1. 1Wrong: You must try the new coffee shop. (Sounds too strong, like an order)
Correct: You should try the new coffee shop. (A friendly recommendation)
*Explanation:* Use should for suggestions, not must, which implies a necessity or obligation.
  1. 1Wrong: If you want to lose weight, you must to exercise. (Incorrect grammar with to)
Correct: If you want to lose weight, you must exercise. (Correct verb form)
*Explanation:* After modal verbs like must or should, always use the base form of the verb without to.
  1. 1Wrong: If it rains, you should to take an umbrella. (Incorrect grammar with to)
Correct: If it rains, you should take an umbrella. (Correct verb form)
*Explanation:* Like with must, should is followed directly by the base verb form.

مکالمات واقعی

Here’s how these grammar points appear in everyday chats:

A

A

"I'm really struggling with my English homework. It's so difficult!"
B

B

"Oh, really? If you're having trouble, you should ask the teacher for help during office hours. She's very approachable."
A

A

"My flight leaves at 6 AM tomorrow. I'm worried I'll miss it."
B

B

"Wow, that's early! You must set several alarms, and you should pack your bag tonight so you don't forget anything important."
A

A

"I'm going hiking this weekend, but the weather forecast looks a bit unpredictable."
B

B

If the weather changes suddenly, make sure you have a map and a fully charged phone. And if it starts raining heavily, turn back immediately!

سؤالات رایج

Q

When should I use should versus must for advice?

Use should for advice, recommendations, or what's generally a good idea. It's a suggestion. Use must when there's a strong obligation, a rule, a necessity, or a strong personal conviction. It implies no real choice.

Q

Can I use if with must?

While grammatically possible (e.g.,

If you must leave, please close the door
), it's less common for *giving advice*. It usually expresses a resignation or necessity already acknowledged. For conditional advice, stick to should or an imperative.

Q

Is you should always polite?

Generally, yes, you should is polite. However, if used too frequently or with a lecturing tone, it can sometimes sound a little preachy. To soften it further, you can say

I think you should...
or
Perhaps you should...

Q

What's the difference between

If you want to...
and
If you need to...
when giving advice?

If you want to...
implies a personal desire or goal (e.g.,
If you want to improve, you should practice daily
).
If you need to...
implies a requirement or necessity (e.g.,
If you need to contact me, call this number
). Both are useful in conditional advice.

بافت فرهنگی

In English, the way we give advice and instructions often reflects politeness and directness. While must clearly states an obligation, it can sometimes sound very direct, almost like an order, especially in informal contexts. Native speakers often prefer should or softer phrases (like
You might want to...
or I suggest you...) even for important advice, to maintain a friendly tone.
Using the first conditional with an imperative ("If you're cold, put on a jacket") is common and generally accepted as clear and direct, but still contextual. Understanding these nuances helps you sound more natural and avoid accidental rudeness.

مثال‌های کلیدی (8)

1

You `should really try` the new coffee shop downtown; their lattes are amazing.

واقعاً باید اون کافه جدید تو مرکز شهر رو امتحان کنی؛ لاته هاشون فوق‌العاده‌ست.

ارائه مشاوره و توصیه‌ها (Should)
2

I think we `should start` our project early to avoid any last-minute stress.

فکر می‌کنم باید پروژه‌مون رو زود شروع کنیم تا از استرس لحظه آخری جلوگیری کنیم.

ارائه مشاوره و توصیه‌ها (Should)
3

You **must** hand in your assignment by Friday.

تو باید تکالیفتو تا جمعه تحویل بدی.

Must: تعهد و ضرورت قوی
4

I **must** remember to call my parents tonight.

من باید امشب یادم باشه به پدر و مادرم زنگ بزنم.

Must: تعهد و ضرورت قوی
5

`If you're hungry, you should grab a snack.`

اگه گرسنه‌ای، باید یه میان‌وعده بخوری.

شرطی اول برای توصیه (should)
6

`If it rains later, you should take an umbrella with you.`

اگه بعداً بارون اومد، باید یه چتر با خودت ببری.

شرطی اول برای توصیه (should)
7

`If you feel cold, close the window.`

اگه سردت شد، پنجره رو ببند.

شرطی اول: دستورات و توصیه‌ها (If + فعل امر)
8

`If you're hungry, grab a snack from the fridge.`

اگه گشنه‌ای، از یخچال یه چیزی بردار.

شرطی اول: دستورات و توصیه‌ها (If + فعل امر)

نکات و ترفندها (4)

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لطیف و دوستانه باش

should برای پیشنهادهای آرومه، نه دستورات سفت و سخت. وقتی نصیحت می‌کنی، بهتره باهاش موافقت کنن تا اینکه مجبور بشن. اینجوری نصیحتت دلنشین‌تره. برای تعهدات خیلی قوی از must استفاده کن.
You should try this amazing cake.
frontend.learn_grammar.from_rule: ارائه مشاوره و توصیه‌ها (Should)
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به 'اجبار قوی' فکر کن

اگه می‌تونی جاش بگی 'کاملاً ضروریه که...' یا 'یه قانونه که تو...'، پس 'must' انتخاب درستییه. از 'should' خیلی قوی‌تره. مثلاً،
You must submit this form by Friday.
frontend.learn_grammar.from_rule: Must: تعهد و ضرورت قوی
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حال ساده توی «If»

همیشه توی قسمت 'if' جمله از زمان 'حال ساده' استفاده کن، حتی اگه داری درباره یه امکان توی آینده حرف می‌زنی. حس «آینده» از 'should' توی بخش اصلی جمله میاد.
If you feel sick, you should see a doctor.
frontend.learn_grammar.from_rule: شرطی اول برای توصیه (should)
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با جملات امری مستقیم باش

یادت باشه که برای دستور یا نصیحتت، باید از فعل به شکل ساده استفاده کنی. will یا should رو بهش اضافه نکن، چون معنی جمله رو عوض می‌کنه و میشه پیش‌بینی یا پیشنهاد، نه دستور مستقیم.
If you are hungry, eat something.
frontend.learn_grammar.from_rule: شرطی اول: دستورات و توصیه‌ها (If + فعل امر)

واژگان کلیدی (6)

recommend to suggest something as a good choice mandatory required by law or rules passenger a person traveling in a vehicle instruction detailed information on how to do something prohibit to formally forbid something advice guidance or recommendations

Real-World Preview

plane

At the Airport Security

stethoscope

A Visit to the Doctor

Review Summary

  • Subject + should + Verb (base form)
  • Subject + must + Verb (base form)
  • If + Present Simple, Subject + should + Verb (base)
  • If + Present Simple, [Imperative Verb]

اشتباهات رایج

Modal verbs like 'should' and 'must' are followed directly by the base verb. Never use 'to' after them.

Wrong: You should to study more.
صحیح: You should study more.

In conditional advice, the second clause still needs a subject (you, he, she) before the word 'should'.

Wrong: If you are hungry, should eat.
صحیح: If you are hungry, you should eat.

In the 'if' clause of a first conditional, we use the Present Simple, not 'will'.

Wrong: If you will see him, tell him the news.
صحیح: If you see him, tell him the news.

Next Steps

You've taken a huge step toward fluency! Being able to guide others is a key leadership skill in any language. Keep practicing these patterns and you'll be a master communicator in no time.

Write 5 rules for your favorite sport using 'must' and 'should'.

Look at a recipe and identify the conditional instructions.

تمرین سریع (9)

شکل صحیح رو برای کامل کردن نصیحت انتخاب کن.

You ___ remember to save your work frequently.

✓ Correct! ✗ Not quite. Correct answer: should
Should برای دادن نصیحت یا توصیه استفاده میشه و نشون میده که ذخیره کردن مداوم کار ایده خوبیه.

frontend.learn_grammar.from_rule: ارائه مشاوره و توصیه‌ها (Should)

اشتباه جمله رو پیدا کن و تصحیحش کن.

Find and fix the mistake:

`If you are tired, you will go to bed.`

✓ Correct! ✗ Not quite. Correct answer: If you are tired, go to bed.
بخش دوم جمله باید یه جمله امری مستقیم go to bed باشه، نه پیش‌بینی با will.

frontend.learn_grammar.from_rule: شرطی اول: دستورات و توصیه‌ها (If + فعل امر)

شکل صحیح رو برای کامل کردن نصیحت انتخاب کن.

If you have a headache, you ___ take some medicine.

✓ Correct! ✗ Not quite. Correct answer: should
ما از 'should' برای نصیحت دادن استفاده می‌کنیم. 'Will' یه نتیجه رو پیش‌بینی می‌کنه و 'can' توانایی رو نشون میده.

frontend.learn_grammar.from_rule: شرطی اول برای توصیه (should)

اشتباه رو توی جمله پیدا کن و درستش کن.

Find and fix the mistake:

If she will arrive late, she should call us.

✓ Correct! ✗ Not quite. Correct answer: If she arrives late, she should call us.
توی قسمت 'if' جملات شرطی نوع اول، از حال ساده استفاده می‌کنیم. بنابراین، 'will arrive' غلطه و باید 'arrives' باشه.

frontend.learn_grammar.from_rule: شرطی اول برای توصیه (should)

اشتباه جمله رو پیدا کن و درستش کن.

Find and fix the mistake:

They should to call before visiting.

✓ Correct! ✗ Not quite. Correct answer: They should call before visiting.
بعد از فعل کمکی should، فعل اصلی همیشه به شکل ساده میاد، بدون 'to'.

frontend.learn_grammar.from_rule: ارائه مشاوره و توصیه‌ها (Should)

فعل امری صحیح رو برای کامل کردن جمله انتخاب کن.

`If you see a good movie playing, ___ me about it!`

✓ Correct! ✗ Not quite. Correct answer: tell
بعد از عبارت if، برای یه دستور مستقیم از شکل ساده فعل استفاده می‌کنیم.

frontend.learn_grammar.from_rule: شرطی اول: دستورات و توصیه‌ها (If + فعل امر)

شکل صحیح رو برای کامل کردن جمله انتخاب کن.

You ___ remember your passport for international travel.

✓ Correct! ✗ Not quite. Correct answer: must
'Must' یه فعل موداله و بعدش شکل اصلی فعل میاد، بدون 'to' یا '-s'.

frontend.learn_grammar.from_rule: Must: تعهد و ضرورت قوی

کدوم جمله به درستی نصیحت میکنه؟

جمله صحیح رو انتخاب کن:

✓ Correct! ✗ Not quite. Correct answer: She should study harder for the test.
Should با شکل ساده فعل (study) میاد، نه studies. Must to اشتباهه؛ must با 'to' نمیاد.

frontend.learn_grammar.from_rule: ارائه مشاوره و توصیه‌ها (Should)

اشتباه جمله رو پیدا و درست کن.

Find and fix the mistake:

We must to study for the final exam.

✓ Correct! ✗ Not quite. Correct answer: We must study for the final exam.
فعل‌های مودال مثل 'must' مستقیماً با شکل اصلی فعل میان. 'to' اضافه اشتباهه.

frontend.learn_grammar.from_rule: Must: تعهد و ضرورت قوی

Score: /9

سوالات رایج (6)

should عمدتاً به این معنیه که انجام کاری ایده خوبیه، یا اینکه چیزی به طور کلی انتظار میره. برای دادن نصیحت، توصیه و پیشنهادهای ملایم استفاده میشه. مثل یه تلنگر مفید بهش فکر کن.
You should take a break.
البته! میتونی should رو برای توصیه به خودت یا برای اینکه روی چیزی که فکر می‌کنی برات بهتره تمرکز کنی، استفاده کنی. مثلاً: 'I should probably get some sleep' یا 'I should start that project soon.'
I should eat healthier.
A: 'Must' عمدتاً برای بیان اجبار قوی، ضرورت، یا ممنوعیت استفاده میشه. یه جورایی فکر کن به معنی محکم 'required' (لازم) یا 'not allowed' (مجاز نیست) هست. مثلاً:
You must follow the rules.
A: نه، 'must' یه فعل موداله (modal verb) هست، یعنی رفتارش با فعل‌های عادی فرق داره. برای فاعل‌های مختلف یا زمان‌های مختلف تغییر شکل نمیده. مثلاً: She must go نه She musts go.
این ساختار برای دادن نصیحت یا پیشنهاد درباره یه موقعیت واقعی و ممکنه که توی آینده اتفاق بیفته. مثلاً داری میگی: 'If X happens, then you should do Y.'
First Conditional معمولی با 'will' یه نتیجه قطعی رو پیش‌بینی می‌کنه (مثلاً: 'If it rains, we will stay home'). اما با 'should' داری به جای پیش‌بینی، یه پیشنهاد یا نصیحت میدی (مثلاً: 'If it rains, you should take an umbrella').