1.MR yang can you give us an example

2.We stayed in the library all day yesterday, how long did you stay there

3.I do not know this word

4.Emma and i studied for two hours last night ,how long did you study

5.Can you see the blackboard

6.He was ten minutes late for the test

7.How long did you watch TV last night

8.I was ten minutes late for the test yesterday

9.Write this word on the blackboard

10.Yes Anna ,I studied all day yesterday for the english test ,how long did you study

11.Can you write an example on the blackboard?

12.How long did you stay in the library last night？

13.Write this word on the blackboard

14.Did you stay in the library all day？

15.Please look at the first example

16.The bus was ten minutes late yesterday morning