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.
- 对于 I, You, We, They, 我们使用 have to.
- 对于 He, She, It, 我们使用 has to.
After have to 或 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 或 doesn't have to.
- 对于 I, You, We, They, 我们使用 don't have to.
- 对于 He, She, It, 我们使用 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 或 Does at the beginning of the question.
- 对于 I, You, We, They, 我们使用 Do... have to...?
- 对于 He, She, It, 我们使用 Does... have to...? (Remember, for he/she/it in questions, we use have to, 而不是 has to, because does already shows the third person singular.)
| 主题 | 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? |
示例
- 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?
练习
西班牙语母语者常犯的错误
Common Mistakes with Have to
讲西班牙语的人有时会犯以下错误：
- 使用 must to 而不是 have to: In English, we say I have to go, 而不是 I must to go. Remember, have to acts like a regular verb for negatives and questions.
- 使用 have to 用于 he/she/it: It's common to forget the 's'. Always say He has to, 而不是 He have to.
- Forgetting do/does in questions and negatives: We don't say You not have to 或 Have you to go? Instead, use You don't have to 和 Do you have to go?
常见问题
Is have to a modal verb?
虽然 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 或 should.
What is the difference between have to 和 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 是 had to for all subjects. For example, Yesterday, I had to work late.
Why do we say has to 用于 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 变成 he has to, following the same grammar rule.
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