To understand the problem is very difficult. very difficult understand th——青夏教育精英家教网——

摘要： To understand the problem is very difficult. very difficult understand the problem.

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1.They heard a message from a spacecraft.(用just改为现在完成时态形式)

They just a message from a spacecraft.

2.Have you got a letter from Lucy?(改为同义句)

Have you Lucy?

3.To understand the problem is very difficult.(用it作为形式主语)

very difficult understand the problem.

4.I came here two days ago.(改为同义句)

I here two days.

5.Her mother has been to Hong Kong several times.(就画线部分提问)

has her mother been to Hong Kong?

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句型转换（每空一词）。
1. They heard a message from a spacecraft. (用just改为现在完成时态形式)
    They just _______ a _______ message from a spacecraft.
2. Have you got a letter from Lucy?(改为同义句)
    Have you _______ _______Lucy?
3. To understand the problem is very difficult.(用it作为形式主语)
     _______ _______very difficult _______understand the problem.
4. I came here two days ago.(改为同义句)
    I _______ _______ here _______ two days.?
5. Her mother has been to Hong Kong several times.(就画线部分提问)
   _______ _______ _______ has her mother been to Hong Kong?

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