Final answer:
A helping verb assists the main verb in a verb phrase and adds meaning or context.
Step-by-step explanation:
The verb that assists the main verb in a verb phrase is called a helping verb. Helping verbs are used to add more meaning or context to the main verb and help express various tenses, moods, and voices. Examples of helping verbs include 'is', 'was', 'have', 'had', 'do', 'does', and 'can'.
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