Reply to "Having to punish"

symphony posted:

As a modal verb can ‘have to’  have an ‘ing’ form?

Hello again, Symphony,

Have to is what is called a "periphrastic modal"; it is not a full-blooded modal like will, would, shall, should, may, might, can, and could. Indeed, have to can be used in combination with those other modals:

  • He will have to work very hard.
  • She shouldn't have to go.
  • They may have to work overtime.

Have to can certainly be used in its ing form having to. Having to is commonly used both as a gerund and as a present participle, depending on the syntactic context. Below is an example of each:

  • participle: He has been having to help her out a lot lately.
  • gerund: He hates having to wake up so early.
symphony posted:

 The verb after ‘have to’ is used in base form only, right?

No. As you can see, having to is also used, both as a present participle and as a gerund. Have to also has the past-tense and past-participle form had to (He had to / has had to help out a lot) and the third-person singular present formhas to.

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