Structure 2013-08-20

p. 269
A
1 have
2 ought
3 could
4 given
5 shouldn't
6 should I
B
1 I should have studied for the math test.
2 You could have shown me your class notes.
3 I shouldn't have stayed up so late the night before the test.
4 John ought to have called you.
5 You might have invited me to join the study group.
(We can't use "may" here, because I know you didn't invite me.)
p. 284
A
1 must
2 might not have
3 have
4 taken
5 may
6 have
7 couldn't
B
1 He may not have gotten my message. (have got - BrEng)
2 She must not have studied.
3 He couldn't have forgotten our date.
4 Myra may have been at the movies.
(We can use "may" here, because it's really possible she was there.)
5 She had to have forgotten.
6 He must not have seen me.
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TEST:

1 a - He should have visited, but he didn't.
- In all the statements on this page, the reality is opposite.
2 could be a or b - We can ask "should have" questions about real or unreal situations.
10 b - "Shouldn't have turned it down" = He turned it down
          = He said "no" = He didn't have a job.

1 It might have been too late...
2 Everyone must have been sleeping.
3 The people couldn't have recognized the signs...
4 The people may not have had a safe place to go to.

1 It must have. - "Ash" is noncount(=it), they couldn't survive on their own. It was necessary that the ash preserved them.
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earthquake
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Homework: p. 2 reading, p. 3 questions