Keep in mind that each sentence you write will need to have agreement between its subject and verb. The following explains how to conjugate a regular present tense verb: They eat pizza. Unfortunately, ...

It can be used in any tense or verb form. The only part of the structure that changes is the verb to have, which should match the appropriate form.

Gerunds are the -ing form of a verb, and infinitives are the to + base form. These words can be confusing; they combine the meaning of a verb with the grammar of a noun. My father asked me to ...