Rewrite the following sentences, beginning as shown, so that the meaning stays the same:
`20.` Tom doesn’t play tennis any more.
`\text{Tom used to play tennis.}`
`21.` The air isn’t pure so we aren’t healthy.
`\text{If the air isn't pure, we won't healthy.}`
`22.` I’m sorry I can’t speak English fluently.
`\text{I wish I could speak English fluently.}`
`23.` They asked about the athletes. We are looking at the picture of the athletes.
`\text{They ask about the athlete to look at the picture of the athletes.}`
`24.` They make a lot of mistakes because they are careless.
`\text{If they are careless, they will make a lot of mistakes.}`
`25.` I don’t stay up late any more.
`\text{I used to stay up late.}`

Cấu trúc:

S+used to+V(0)+O.

If+S+V(present simple), S+will/won't+V(0).

S+V(tùy theo thì)+O+because+S+V(tùy theo thì)+O.

S+wish(es/ed)+S+V(past simple)+O.

S+ask(s/ed)+O+to V+O

`\text{Học tốt}`

$#vpgh1810$

20. Tom used to play tennis.

21. If the air was pure, we would be healthy.

22. I wish I could speak English fluently.

23. They ask about the athlete of whom we are looking at the picture.

24. If they were not careless, they would not make a lot of mistakes.

25. I used to stay up late. 

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Các cấu trúc sử dụng:

used to V: thường làm gì (trong quá khứ )

Kết hợp câu bằng câu điều kiện, thức giả định với wish,....