I (1) must / should have been mad to enter the karaoke competition last night. What was I thinking? I really (2) can't / should have thought about it a bit more carefully. Why did I agree to it when I (3) could / would have stayed at home and watched a DVD instead? But no! I made a complete fool of myself in front of all my friends. It might (4) be / have been all right if they'd given me a song I knew. But it was this really weird song I'd never heard before. I (5) can't / mustn't have got any of the notes right. It was so embarrassing! 2 Complete each second sentence so that it means the same as the sentence before it. Use no more than three words. 1 Why didn't you buy the tickets today? You should the tickets today. 2 It's possible that Rachel remembered to set the video. Rachel might to set the video. 3 They obviously forgot what time the concert starts. They must what time the concert starts. 4 There's no way Dave was a stand-up comedian! Dave can't a stand-up comedian! 5 There was a chance I'd win the talent contest but I didn't. I could the talent contest but I didn't. 3 For each situation, write what you say using the prompts. Your friend had a party and didn't tell you. (should/tell/your party) You 2 You see a friend coming out of the cinema with a box of popcorn. (must/see/a film) He 3 You see people coming out of a concert looking unhappy. (can't/be/a good concert) 'It 4 Your friend has lost her voice after singing for a long time. (must/sing/for hours) She 5 You want to see a show but there are no tickets left. (ought/buy/tickets/yesterday) We