... understanding of auxiliary verbs Continued from Page 1) Test your Understanding of Auxiliary Verbs In each of the following sentences an auxiliary verb is missing Write the missing auxiliary verbs on... in Continuous (Progressive) Verbs It is also used with the Past Participle in the Passive 'HAVE' is used with the Past Participle to form the Perfect Aspect Auxiliary verbs are conjugated depending... telephoned What are you doing tomorrow afternoon? Knowing correct auxiliary verb usage is key to tense usage Every tense takes an auxiliary form of the verb There are three exceptions to this rule: