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10 She might not be working today. 11 She might not have been feeling well yesterday. You can use may instead of might m all these sentences. 29.2

You can use may instead of might in all these sentences. 30.5 2 I might as well go to the concert. 3 We might as well paint the bathroom. 4 We might as well watch the film. You can use may instead of might in all these sentences.
UNIT 31

6 7 8 9

needn't needn't must ... mustn't needn't ... must

2 be
3 have been 4 be waiting 5 have 29.3 2 a She might be watching TV in her room. b She might have gone out. 3 a It might be in the car. b You might have left it in the restaurant last night. 4 a He might have gone to bed early. b He might not have heard the doorbell. c He might have been in the shower. You can use may instead of might in all these sentences. 29.4 3 might not have received it 4 couldn't have been an accident 5 couldn't have tried 6 might not have been American
UNIT 30

32.3 2 She needn't have bought lany i eggs. 3 You needn't have shouted at me. 4 He needn't have sold his car. 5 We needn't have taken the camcorder (with usl. 6 I needn't have rushed (to the station). 32.4 2 You needn't have walked home. You could have taken a taxi. 3 You necdn't have stayed at a hotel. You could have stayed with us. 4 She needn't have phoned me in the middle of the night. She could have waited until the morning. 5 You needn't have left without saying anything. You could have said goodbye.
UNIT 33

31.1 3 We had to close 4 She has, to leave 5 do you have to be 6 I have to hurry 7 Does he have to travel 8 do you have to go 9 did you have to wait 10 had to do 31.2 3 have to make 4 don't have to do 5 had to ask 6 don't have to pay 7 didn't have to go 8 has to make 9 will have to drive 31.3 3 OK (have to is also correct) 4 He has to work. 5 I had to work late yesterday evening. 6 OK (have to is also correct) 7 She has had to wear glasses since she was very young. [For the present perfeet (has hadi with for and since, see Units 11-12.) 31.4 3 don't have to 4 mustn't 5 don't have to 6 mustn't 7 doesn't have to 8 mustn't 9 mustn't 10 don't have to
UNIT 32

30.1 2 I might buy a Mercedes. 3 I might go to London. 4 He might come on Saturday. 5 I might hang it in the dining room. 6 She might go to university. You can use may instead of might in all these sentences. 30.2 2 might wake 3 might bite 4 might need 5 might slip 6 might break You can use may instead of might in all these sentences. 30.3 2 might be able to mect/sce 3 might have to work 4 might have to go/leave You can use may instead of might in all these sentences. 30.4 2 I might not go out this evening. 3 We might not get tickets for the concert. 4 Sue might not be able to come out with us this evening.

33.1 2 You should look for another job. 3 He shouldn't go to bed so late. 4 You should take a photograph. 5 She shouldn't use her car so much. 6 He should put some pictures on the walls. 33.2 2 I don't think you should go out. /1 think you should stávat home. 3 1 think you should apply for it. / . .. for the job. 4 I don't think the government should increase taxes. 33.3 3 should come 4 should do 5 should have done 6 should win 7 should have won 8 should be 9 should have arrived 33.4 3 We should have reserved a table. 4 The shop should be open (now). / The shop should have opened by now. or It should ...

32.1 2 necdn't come 3 needn't walk 4 needn*t ask 5 needn't tell 6 needn't explain 32.2 3 needn't 4 must 5 mustn't