Helping Verbs
Helping or auxiliary verbs allow us to create verb phrases. Without them we would have a hard time expressing exactly when something happened (tense), what the tone of the statement is (mood), and whether the action is active or passive (voice).
In addition, a subcategory of helping verbs (called modal auxiliaries) provides other nuances like possibility and necessity.
Three of the most common helping verbs come in quite a few forms (in grammatical terms, they are strongly inflected):
Be | Do | Have |
am | do | have |
are | does | has |
is | did | had |
was | doing | having |
were | done | |
be | ||
being | ||
been |
These helping verbs make it easy to create verb phrases:
does suggest
have been talking
did wonder
were harvesting
In a sentence, these phrases may be interrupted by adverbs:
You were not listening
I am fortunately going on holidays then.
Alternatively, in questions a helping verb may come before the subject:
Have you been taking your medication?
The only thing that never changes is that the helping verbs always come before the main verb.