Use modal verbs where possible. If a modal verb can't be used with a certain tense, use its substitute. 1. You (must) must mus get up early tomorrow. 2. You (not / needе) call a baby sitter. 3. We (may) watch the film tonight. 4. He (not / can) see me yesterday 5. She (must) stay at school yesterday afternoon. 6. (may / you) go to the disco yesterday?
