Modal Verb: Should

Auxiliary verbs are used together with a main verb to give grammatical information and therefore add extra meaning to a sentence. Information that is not given by the main verb.

• They are used to form the passive voice.
• They are used to form the continuous tense.
• They are used to form the perfect tense.

Be, Do and Have are auxiliary verbs, they are irregular verbs and can be used as main verbs. The verbs 'to be' and 'to have' are the most commonly used auxiliary verbs and work alongside the main verbs in any statement.

Modal verbs are also auxiliary verbs, but will be treated separately, these are can, could, may, might, must, shall, should, will, and would, they differ from the others in that they can never function as a main verb.

To be

Be is the most common verb in the English language. It can be used as an auxiliary and a main verb. It is used a lot in its other forms.

• Base form = be
• Present form = am/is/are
• Past form = was/were
• Present Participle / Gerund = being
• Past Participle = been

The verb do is one of the most common verbs in English. It can be used as an auxiliary and a main verb. It is often used in questions.

• Base form = do
• Present form = do/does
• Past form = did
• Present Participle / Gerund = doing
• Past Participle = done

!Note - The auxiliary verb 'do' is always followed by the base form (infinitive).

Have is one of the most common verbs in the English language.

• Base form = have
• Present form = have / has
• Past form = had
• Present Participle / Gerund = having
• Past Participle = had