～はず

§ What does it mean and when do people use it?

The Japanese grammar pattern ～はず (hazu) is an incredibly useful expression for conveying expectation or belief based on some kind of evidence or information. It translates roughly to "it should be," "it is expected to be," or "it ought to be." Think of it as a way to say you're pretty sure about something, but you're not stating it as a 100% undeniable fact. You're making a reasonable assumption.

When you use ～はず, you're indicating that there's a strong likelihood of something being true or happening, often because you have prior knowledge, observed something, or there's a logical reason for it. It's a key phrase for expressing probability or certainty based on your understanding of a situation.

Usage Context

You can use ～はず in various situations, such as:

• Expressing a strong expectation: When you expect something to happen or be true based on available information or common sense.

• Making an educated guess: When you're making a prediction that you feel confident about.

• Confirming something you believe to be true: Even if you haven't directly verified it, you're pretty sure it's correct.

• Talking about someone's schedule or plans: If you know their routine, you can use ～はず to state what they should be doing.

It's important to remember that while ～はず expresses a strong likelihood, it's not a definitive statement. There's always a slight possibility that your expectation might not be met. It's like saying, "Based on what I know, this is what I expect," rather than "This *is* what's happening."

Grammar Connection

～はず typically attaches to the plain form of verbs, i-adjectives, and na-adjectives, and nouns. We'll cover the specific conjugations in more detail later, but for now, understand that it follows the basic plain form rules.

Let's look at some examples to get a feel for how it's used in practice:

Hint

He should come. / He is expected to come.

In this example, the speaker expects him to come, perhaps because they know his schedule or he promised to. It's not a definite "he will come," but a strong expectation.

Hint

This should be easy. / This is expected to be easy.

Here, the speaker believes the task or item is easy, likely based on previous experience or its nature. It's an educated guess about its difficulty.

Understanding ～はず is crucial for natural conversation in Japanese, as it allows you to express your thoughts and predictions with an appropriate level of certainty, reflecting how often we make assumptions based on what we know. It's a subtle but powerful tool for effective communication.

Hey everyone! Let's talk about a super useful Japanese phrase: ～はず. This one is all about expressing expectation or belief. Think of it like saying "it should be" or "it is expected to be" in English. It's a handy way to talk about things you're pretty sure about, based on information you have.

Japanese Word

～はず (hazu)

CEFR Level

B1

Definition

It should be; it is expected to be

§ How to Form Sentences with ～はず

Connecting ～はず to words is pretty straightforward. Here's a quick guide:

• Verbs: Use the plain form (dictionary form, ない-form, た-form).

彼は来るはずだ。

He should come.

• i-Adjectives: Just add ～はず after the adjective.

新しいパソコンは高いはずだ。

The new computer should be expensive.

• na-Adjectives: Add な before ～はず.

彼女は元気なはずだ。

She should be fine/energetic.

• Nouns: Add の before ～はず.

これは本物のはずだ。

This should be the real thing.

§ Where You'll Actually Hear This Word

～はず is used constantly in everyday Japanese. You'll hear it in casual conversations, at work, in school, and even in news reports when people are expressing a strong probability or expectation.

§ At Work

In a professional setting, ～はず is great for discussing plans, deadlines, and expected outcomes. It shows you've considered the situation and have a reasonable expectation.

I already sent the documents, so they should have confirmed them.

The meeting was supposed to start at 3 PM, but no one's here yet.

§ At School

Students and teachers use ～はず to talk about assignments, test results, and schedules. It's about what's anticipated.

I taught this problem yesterday, so you should be able to do it.

The test results should be announced next Friday.

§ In the News

News reporters and analysts often use ～はず to convey likely outcomes or what is generally understood to be true based on available information.

The new law is expected to go into effect next month.

According to economic experts, stock prices should rise.

§ Everyday Conversations

You'll hear ～はず all the time with friends and family. It's natural to express your expectations or beliefs.

I should have put the keys here, but where are they?

That shop should be open by now.

§ Don't confuse ～はず with other expressions of certainty

The Japanese language has several ways to express certainty or likelihood. While they might seem similar at first, they carry different nuances. A common mistake is using ～はず interchangeably with phrases like ～でしょう (deshou), ～だろう (darou), or ～に違いない (ni chigainai).

Here's a quick breakdown to help you understand the differences:

• ～はず (hazu): Expresses a strong expectation or logical deduction based on available information. There's a high degree of confidence, but it's still an expectation, not a 100% guarantee.
• ～でしょう (deshou) / ～だろう (darou): These are more general expressions of probability or conjecture. They imply less certainty than ～はず and often depend on the speaker's personal opinion or a weaker basis of information.
• ～に違いない (ni chigainai): This expresses near-absolute certainty. It means "it must be" or "there's no doubt that." The speaker is very confident in their statement.

§ Using ～はず in negative statements

Another area where learners often stumble is forming negative sentences with ～はず. The correct way to express "it shouldn't be" or "it's not supposed to be" is with ～はずがない (hazu ga nai) or ～はずはない (hazu wa nai). Simply attaching ない (nai) to ～はず can be grammatically incorrect or convey a different meaning.

Incorrect Example

彼は忙しくないはずです。(Kare wa isogashikunai hazu desu.)
*While technically understandable, this is not the natural way to say it.*

Correct Example

彼は忙しいはずがありません。(Kare wa isogashii hazu ga arimasen.)
彼は忙しいはずはない。(Kare wa isogashii hazu wa nai.)
彼は忙しくないはずはない。(Kare wa isogashikunai hazu wa nai.) *This translates to "It's impossible that he's not busy" or "He definitely should be busy."*

The key is to attach がない or はない directly after ～はず, and the verb or adjective preceding ～はず should be in its plain form (dictionary form for verbs, い-adjective as is, な-adjective with な, or noun with の).

Hint: That kind of thing shouldn't/couldn't happen.

Hint: He shouldn't be late.

§ Forgetting the particle before ～はず

Remember that ～はず is always preceded by a plain form of a verb, an い-adjective, a な-adjective with な, or a noun with の. Forgetting this connecting particle is a common oversight.

• Verb (plain form) + はず: 読むはず (yomu hazu - should read)
• い-adjective + はず: 忙しいはず (isogashii hazu - should be busy)
• な-adjective + なはず: きれいなはず (kirei na hazu - should be pretty/clean)
• Noun + のはず: 学生のはず (gakusei no hazu - should be a student)

Hint: It should be sunny today.

Hint: He should be Japanese.

§ Overusing ～はず

While ～はず is useful for expressing logical deductions, overusing it can make your speech or writing sound repetitive or overly insistent. Sometimes, a simpler expression of probability or just a direct statement is more natural. For example, if you are simply stating something you believe to be true, you might not need ～はず if the context already implies expectation.

§ What does ～はず mean?

The Japanese expression ～はず (hazu) indicates that something “should be” a certain way, or that it’s “expected to be” a certain way. It expresses a high degree of probability or a logical expectation based on information or common sense. Think of it as saying, “Based on what I know, this is probably true.”

§ How to use ～はず

～はず attaches to verbs (plain form), い-adjectives, な-adjectives (with な), and nouns (with の). The conjugation is pretty straightforward:

• Verbs: Plain form + はずです (e.g., 行くはずです - I should go)
• い-adjectives: い-adjective + はずです (e.g., 楽しいはずです - It should be fun)
• な-adjectives: な-adjective + な + はずです (e.g., 便利なはずです - It should be convenient)
• Nouns: Noun + の + はずです (e.g., 学生のはずです - He should be a student)

Kare wa mou tsuita hazu desu.

He should have arrived already.

Kono hon wa omoshiroi hazu da yo.

This book should be interesting.

Kare wa uso o tsuku hazu ga nai.

There's no way he would lie. (He shouldn't lie.)

§ Similar words and when to use ～はず vs alternatives

～だろう / ～でしょう (darou / deshou)

These expressions also convey probability, but they are softer and more subjective than ～はず. While ～はず is based on concrete evidence or strong logical reasoning, ～だろう/～でしょう are more about the speaker's personal conjecture or estimation. You might use them when you're making an educated guess, but you don't have definitive proof. For example, if you say 明日雨が降るだろう (Ashita ame ga furu darou), you're saying "It will probably rain tomorrow," based on a general feeling or light observation. If you say 明日雨が降るはずだ (Ashita ame ga furu hazu da), it suggests you've checked a weather forecast or have some specific reason to believe it will rain.

Kare wa isogashii darou.

He is probably busy (speaker's guess).

～に違いない (ni chigainai)

This phrase expresses even stronger certainty than ～はず. It means "it must be" or "there's no doubt that..." You use ～に違いない when you are almost 100% sure, based on very strong evidence or an undeniable logical conclusion. While ～はず implies a strong expectation, ～に違いない implies a virtual certainty. For instance, if you see a car that looks exactly like your friend's and is parked in their usual spot, you might say あれは彼の車に違いない (Are wa kare no kuruma ni chigainai - That must be his car).

Kare no hanashi wa hontou de aru ni chigainai.

His story must be true.

～はずがない (hazu ga nai)

This is the negative form of ～はず, and it means "there's no way that..." or "it can't be that..." It expresses strong denial or disbelief based on logic or common sense. If someone tells you something unbelievable, you might respond with そんなはずがない (Sonna hazu ga nai - That can't be true!).

Kanojo ga sonna koto o iu hazu ga nai.

There's no way she would say such a thing.

§ Key takeaway

While all these expressions relate to probability or expectation, the key difference lies in the degree of certainty and the basis for that certainty. Use ～はず when you have a logical reason or evidence for your expectation. Use ～だろう/～でしょう for more general, subjective guesses. And use ～に違いない for near-certainty. Mastering these nuances will significantly improve your Japanese communication!