Have to (objective obligation)
We often use have to
to say that something is obligatory, for example:
Structure of Have toHave to
- Children have to go to school.
is often grouped with modal auxiliary verbs for convenience, but in fact it is not
a modal verb. It is not even an auxiliary verb. In the have to
structure, "have" is a main verb
. The structure is:
subject + auxiliary verb + have
+ infinitive (with to
Look at these examples in the simple tense:
Use of Have to
subjectauxiliary verbmain verb haveinfinitive (with to)
|+||She|| ||has||to work.|| |
|-||I||do not||have||to see||the doctor.|
|?||Did||you||have||to go||to school?|
In general, have to
obligation. The subject of have to
is obliged or forced to act by a separate, external power (for example, the Law or school rules). Have to
. Look at these examples:
- In France, you have to drive on the right.
- In England, most schoolchildren have to wear a uniform.
- Youcef has to wear a tie at work.
In each of the above cases, the obligation is not the subject's opinion or idea. The obligation is imposed from outside.
We can use have to
in all tenses
, and also with modal auxiliaries. We conjugate it just like any other main verb. Here are some examples:
| ||subject||auxiliary verb||main verb have||infinitive|| |
|past simple||I|| ||had||to work||yesterday.|
|present simple||I|| ||have||to work||today.|
|future simple||I||will||have||to work||tomorrow.|
|present continuous||She||is||having||to wait.|| |
|present perfect||We||have||had||to change||the time.|
|modal (may)||They||may||have||to do||it again.|
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