1.表示措施
1)We should take some effective measures.
2)We should try our best to overcome(conquer)the difficulties.
3)We should do our utmost in doing sth.
4)We should solve the problems that we are confronted(faced)with.
例如：
The housing problem that we are confronted with is becoming more and more serious.Therefore，we must take some effective measures to solve it.
2.表示变化
1)Some changes have taken place in the past five years.
2)A great change will certainly be produced in the world’s communications.
3)The computer has brought about many changes in education.
例如： Some changes have taken place in people’s diet in the past five years.The major reasons for these changes are not far to seek.Nowadays，more and more people are switching from grain to meat for protein，and from fruit and vegetable to milk for vitamins.
3.表示事实、现状
1)We cannot ignore the fact that...
2)No one can deny the fact that...
3)There is no denying the fact that...
4)This is a phenomenon that many people are interested in….
5)However，that’s not the case.
例如：We cannot ignore the fact that industrialization brings with it the problems of pollution.To solve these problems， we can start by educating the public about the hazards of pollution.The government on its part should also design stricter laws to promote a cleaner environment.
4.表示比较
1.The advantage far outweigh the disadvantages.
2.The advantages of A are much greater than those of B.
3.A may be preferable to B, but A suffers from the disadvantages that...
4.It is reasonable to maintain that ...but it would be foolish to claim that...
5.For all the disadvantages, it has its compensating advantages.
6.Like anything else, it has its faults.
7.A and B has several points in common.
8.A bears some resemblances to B.
9.However, the same is not applicable to B.
10. A and B differ in several ways.
11. Evidently, it has both negative and positive effects.
12. People used to think ..., but things are different now.
13. The same is true of B.
14. Wondering as A is ,it has its drawbacks.
15. It is true that A ... , but the chief faults (obvious defects )are ...
16. Compared with A，B...
17. I prefer to read rather than watch TV.
18. There is a striking contrast between them
例如： Compared with cars，bicycles have several advantages besides being affordable.Firstly，they do not consume natural resources of petroleum.Secondly，they do not cause the pollution problem.Last but not least，they contribute to people’s health by giving them due physical exercise.