Learn English – Infinitive form of helping verb

infinitivesverbs

I had a confusion between Infinitive form of the verb and the base form of the verb. But this LINK explains the difference between infinitive and base form of the verb.

Base form:
be, have, hold, sleep, dream

Infinitive form:
to be, to have, to hold, to sleep, to dream

Can we write all helping verbs in infinitive form which are mentioned below:

  1. be (including am, is, are, was, were, been)
  2. have, has had
  3. do, does, did
  4. can
  5. could
  6. may
  7. might
  8. will
  9. would
  10. shall
  11. should
  12. must

I know these exists to be, to do, to have, but do others?

Best Answer

Short Answer:

No, you have written all possible conjugations

Long Answer:

No. Modal (Specifically Conditional) Verbs (pretty much the -oulds and their "relatives") do not have infinitive forms, because all usages of those verbs are the same (except for the modals that can be used for other purposes like to be and to have). The subject of the sentence does not change how those verbs are written at all.

This is also a case for a lot of English Verbs, not just the modals

English pretty much did away with subject conjugation (the only verb I can think of that has a conjugation for nearly every subject is the verb to be)