64일차. ♣ Unit 5. Awkward situations - LESSON 1. TALKING ABOUT AWKWARD SITUATIONS - [Review: auxiliary verbs] ※ Review: auxiliary verbs *You can use the irregular verb be as both a main verb and an auxiliary verb. As an auxiliary verb, be is used with a main verb in continuous and passive tenses. They were getting along very well until he told an offensive joke. She was embarrassed by him and left..