`1`. They (go) ..…went….... home after they (finish) ……had finished……… their work.

`2`. She said that she (already, see) ……had already seen……… Dr. Rice.

`3`. After taking a bath, he (go) ………went………… to bed.

`4`. He told me he (not/eat) ………hadn't eaten………… such kind of food before.

`5`. When he came to the stadium, the match (already/ begin) ……had already begun……

`6`. Before she (watch) ……watched…………….. TV, she (do)  …had done…… homework.

`7`. What (do) …had he done…… he before he went to the airport?

`8`. After they (go) …had gone……, I(sit) ……sat……… down and (watch) …watched…… TV

`9`. Yesterday, John (go) ……had gone…… to the store before he (go) ……went…………… home.

`10`. She (win) ……won……… the gold medal in 1986.

`→` Công thức thì quá khứ đơn : S + V-ed

`→` Công thức thì quá khứ hoàn thành : S + had + $V_{( ed/ II)}$ 

1. They  will go home after they have finished their work.

2. She said that she has already seen  DR. Pice.

3. After taking a bath, he went. to bed.

4. He told me he hadn't eaten such kind of food before.

5. When he came to the stadium , the match has already begun

6. Before I  watched TV, I had done my homework

7.Alan hardly had prepared for dinner when her husband went home

8.After they go, I sit down and rest

9. Yesterday, John had gone to the store before he went home.

10.She won the gold medal in 1986.

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