现在完成? 是不是 present perfect tense?
如果是的话：应该多用 - already, recently, yet, lately等等.
buy = bought catch = caught choose = chosen come = come cost = cost cut = cut do = done draw = drawn
1. Madam Lee has bought a new house in China.
2. The fisherman caught a lot fish recently.
3. Have you chosen where to go?
4. They've never come to school recently.
5. That car has cost him a lot of money.
6. The little boy has just cut his little finger.
7. All the homework has been done.
8. Ten pictures have been drawn by the artist lately.