8, what time he went to bed last night
9, he might go home then
10,  there was an accident
11, they were waiting for the school bus
12,if i had to go then
13,if i were going to visit his aunt the next day
14, that they should......
15,i were ....
16,the sun rised in the east
17,she hasn't....the day before
18,we might...everyday