Grammar
Main and Helping Verbs
Verbs that are made up of more than one word are verb phrases. In a verb phrase, the main verb names the action. The helping verb helps tell the time of the action. Some common helping verbs are has, have, had, am, is, are, was, were, do, does, did, can, could, will, would, and should.
The main verb is always the last word in a verb phrase. (Animals are losing habitats.)
There may be more than one helping verb in a verb phrase. (We should have saved more wetland habitats.)
The helping verb helps tell the time of the action.