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What Does Have to Mean?

In English, we use have to when we talk about things that are necessary or obligatory. It means you must do something because of a rule, a law, or a situation.

Think of it as a responsibility or a task you cannot avoid.

• It shows an external obligation. Someone or something (like a rule) makes you do it.
• It is very common for daily routines, chores, and work or school duties.

How Do We Form Sentences with Have to?

The form of have to changes a little depending on the subject.

• ～について I, You, We, They, we use have to.
• ～について He, She, It, we use has to.

After have to または has to, we always use the base form of the verb (the infinitive without 'to').

How Do We Make Negative Sentences with Have to?

To say that something is NOT necessary or NOT an obligation, we use don't have to または doesn't have to.

• ～について I, You, We, They, we use don't have to.
• ～について He, She, It, we use doesn't have to.

This means you have a choice; it's not compulsory.

How Do We Ask Questions with Have to?

To ask about obligations, we use Do または Does at the beginning of the question.

• ～について I, You, We, They, we use Do... have to...?
• ～について He, She, It, we use Does... have to...? (Remember, for he/she/it in questions, we use have to, ではなく has to, because does already shows the third person singular.)

Conjugation of <span data-no-translation>Have to</span> (Present Simple)

Subject	Positive (+)	Negative (-)	Question (?)
I / You / We / They	have to + verb	don't have to + verb	Do ... have to + verb?
He / She / It	has to + verb	doesn't have to + verb	Does ... have to + verb?

例

• I have to wash the dishes every day.
• My dad has to go to work at 7 o'clock.
• My friends have to do their homework in the afternoon.
• You don't have to cook tonight. We can order pizza!
• She doesn't have to wake up early on Saturdays.
• Do you have to wear a uniform at school?
• Does he have to finish the report today?

練習

スペイン語話者がよく犯す間違い

Common Mistakes with Have to

スペイン語を話す人たちは、次のような間違いを犯すことがあります：

• 使用方法 must to ～の代わりに have to: In English, we say I have to go, ではなく I must to go. Remember, have to acts like a regular verb for negatives and questions.
• 使用方法 have to ～のために he/she/it: It's common to forget the 's'. Always say He has to, ではなく He have to.
• Forgetting do/does in questions and negatives: We don't say You not have to または Have you to go? Instead, use You don't have to そして Do you have to go?

よくある質問

は have to a modal verb?

一方で have to expresses obligation like modal verbs (must), it behaves more like a regular verb. It needs do/does for questions and negatives, unlike true modal verbs such as can または should.

「～と～の違いは何ですか」 have to そして must?

For A1 learners, the main difference is that have to usually shows an external obligation (a rule, a law, someone else's decision). Must often shows a strong personal feeling or an obligation from the speaker. For example, I have to wear a uniform (school rule) vs. I must study for the exam (my strong personal decision).

What is the past tense of have to?

The past tense of have to は had to for all subjects. For example, Yesterday, I had to work late.

Why do we say has to ～のために he/she/it?

Just like with the verb have, we add an '-s' or change the form for the third person singular in the present simple. So, he has ～になる he has to, following the same grammar rule.

関連レッスン

• Modal verbs
• Modal verbs
• Modal verbs
• Modal verbs