句型转换。

1. He ran in the school for half an hour (对画线部分提问)

    _______ _______ _______ he run in the school ?

2. We started to skate two hours ago. (对画线部分提问)

    _______ _______ you start to skate?

3. They started to play the piano one or two hours ago. (改为同义句)

    They started to play the piano_______ _______ _______two ago.

4. They have been away from here since two years ago. (改为同义句 )

    ______ ______two years______ they left here.

5. The man began to work four hours  ago. (改为同义句 )

    The man has _______ _______ four hours.