5）将复合句改为另一复合句。
I went to bed after my father came back．
→I didn't go to bed until my father came back．
I think science is less interesting than English．
→Science isn't as ／ so interesting as English，I think．
6）一些常见句型及惯用法之间的转换。
It's time for school
→It's time to go to school．
Let's go out for a walk．
→What ／How about going out for a walk？
Phone is short for telephone．
→Phone is another way of saying telephone．
David spent half an hour on his homework last night．
→David spent half an hour（in）doing his homework last night．
→It took David half an hour to do his homework last night．
He spent 4，000yuan on the computer．
→He spent 4，000yuan for the computer．
→The computer cost him 4，000yuan．
We have lessons from Monday to Friday in a week．
→We have lessons every day except Saturday and Sunday．
That watch doesn't work．
→There is something wrong with the watch．
Emma likes pork．Linda likes pork，too．
→Emma likes pork．So does Linda．
