What is added to a main verb to make it a verb phrase?

Answer 1

To make a verb phrase, another verb that modifies the verb is added to the verb. For example: "I go to the store" becomes "I will go to the store"

You can add:

a be verb -- was watching, is kept, are used

have -- have eaten, have seen

has -- has seen, has known

will -- will come, will be, will see

can -- can come, can buy

could -- could walk, could find

must -- must walk, must wear

had -- had seen, had bought

Answer 2

Auxiliary verbs, also known as helping verbs, are added to a main verb to create a verb phrase. These auxiliary verbs can express tense, aspect, voice, modality, and other grammatical meanings in combination with the main verb.