1.we had better have a rest
2.you'd better not stay too late
3.you ought to lie down and have a sleep
4.you should get up an hour earlier
5.you shouldn't prevent him going there
6.you ought to start at once
7.you'd better not make the same minstake again
8.why couldn't he think that
9.he said i should do it
10.how careless you are!you should be more careful