1、I thought we (have met) each other before.
2、The teacher told us the earth (goes) round the sun.
3、There (has been) a lot of changes in my hometown since 2000.
4、He said his father (died) in 1985.
5、When did the teacher start (teaching)?
1、一定要按时交作业.
The homework must be handed in （by us on time）.
2、等他让我生气.
（Waiting for） him made me angry.
3、我的朋友从我旁边走过,但没看见我.
My friend （passed by） me,but he didn't see me.