C.Mệnh để so sánh.

15.She knows a lot more about it than I do.

-I don't know.......about it as much as she does. 

16.Jane is a better cook than Betty.

-Betty can't.............cook as well as Jane

17.Tom is younger than he looks.

-Tom isn't....…………….. as old as he looks.

18.I didn't spend as much money as my friend did.

-My friend...... spent more money than I did

19.He doesn't know them as well as I do.

-I know.......them more than he does. 

20.It's still cold but it was colder yesterday.

-It isn't........ as cold as yesterday. 

D.Mệnh đề chỉ nguyên nhân và kết quả.

21. The children couldn't go swimming because the sea was very rough. 

-The sea was too.......rough for the children to swim in. 

22. We didn't have enough money, so we didn't go on holiday.

-If we........had had enough, we would have gone on holiday. 

23. We got lost because we didn't have a map.

-If we.......had had a map, we would not have got lost.

24. The bridge was so low that the bus couldn't go under it.

-It was.... such a low bridge that the bus couldn’t go under it. 

25.It was so late that nothing could be done.

-It was too......late to do anything. 

26.He couldn't afford to buy a car.

-The car.........was too expensive for him to buy. 

27.That restaurant is so dirty that no one wants to eat there.

-It is such..........a dirty restaurant that no one wants to eat there. 

28. The test was too difficult for the pupils to do.

-The test.......was not easy enough for the pupils to do. 

29.Phone now or you will be late.

=>You will......be late if you do not phone now.