2 Read the sentences and choose the correct alternative. 1 You mustn't / don't have to play your music so loud. You'll damage your eardrums. 2 You could / you can't go to the concert. must be really frustrated that 3 Doctors say the music at some concerts should / can be deafening. ct 4 We had seats in the front row. We could / might see everything! 5 You should / could get there early if you want to sit near the stage. 3 Write sentences using modal perfects. 1 I regret going to the concert. The music was too loud. 2 It's possible she was at the concert, but I didn't see her. 3 It's obvious he's left already. His coat isn't me. I was at here. 4 I don't believe he tried to call home all day. 5 It was unkind of you not to invite your sister.

Sure! Here are the correct alternatives for the first section and sentences using modal perfects for the second section: ### 2. Choose the correct alternative: 1. You **mustn't** play your music so loud. You'll damage your eardrums. 2. You **could** go to the concert. 3. Doctors say the music at some concerts **can** be deafening. 4. We had seats in the front row. We **could** see everything! 5. You **should** get there early if you want to sit near the stage. ### 3. Write sentences using modal perfects: 1. I **shouldn't have gone** to the concert. The music was too loud. 2. It's possible she **could have been** at the concert, but I didn't see her. 3. It's obvious he **must have left** already. His coat isn't here. 4. I don't believe he **could have tried** to call home all day. 5. It was unkind of you **not to have invited** your sister.