I know that two verbs joined by a conjunction and referring to the same subject make a compound verb:
- The dog ran and jumped in the park.
- I read a book and listened to music while I waited.
- The boys whispered and giggled as their aunt scolded them.
And I know that to be, to have, or a modal verb paired with a verb is an auxiliary verb:
- My mother is sleeping.
- The dog had bitten the mailman.
- You should watch this movie.
But what about when an infinitive follows a conjugated verb? Are the following sentences compound verbs, auxiliary verbs, or something else?
- He decided to give them a tour.
- I need to go to the store.
- Many older people prefer to write cursive.