1.did the sun set at twenty past seven?
the sun didn't set at twenty past seven.
2.did he eat his lunch at one o'clock?
he didn't eat his lunch at one o'clock.
3.did they do their homework last night?
they didn't do their homework last night.
4.did he came by car this morning?
he didn't come by car this morning.
5.did the sun rise at half past five?
the sun didn't rise at half past five
6.did we swim across the river yesterday?
we didn't swim across the river yesterday.
这类题目只要把动词的过去式被出来就可以迎刃而解了