1.He may have been writing the paper for months.

2.He must have been writing the paper for months.

3.Can he have been writing the paper for months?

4.Can / Could he have read the book?

5.He may / might have read the book.

6.He should(ought to )have read the book.

7. He must have read the book.

8.He can’t have read the book.

答案：

1.can’t have finished

2.needn’t have told

3.might have arrived

4.should have thought

5.ought to have refused

1.He may have been writing the paper for months.

他也許幾個月來一直在寫論文。

2.He must have been writing the paper for months.

他肯定幾個月來一直在寫論文。

3.Can he have been writing the paper for months?

難道他幾個月來一直在寫論文嗎?

4.Can / Could he have read the book?

他可能讀過那本書嗎?

5.He may / might have read the book.

他也許讀過那本書。

6.He should(ought to )have read the book.

他應(yīng)該讀過那本書。

7.He must have read the book.

他一定讀過那本書。

8.He can’t have read the book.

他不可能(決不會)讀過那本書。