1.表示原因
1)There arethree reasons for this.
2)The reasonsfor this are as follows.
3)The reason forthis is obvious.
4)The reason forthis is not far to seek.
5)The reason forthis is that...
6)We have goodreason to believe that...
例如：
There are threereasons for the changes that have taken place in our life.Firstly，people’s living standard has been greatlyimproved.Secondly，most peopleare well paid， and they canafford what they need or like.Last but not least，more and more people prefer to enjoy modern life.
注：如考生写第一个句子没有把握，可将其改写成两个句子。如：Great changes have taken place in our life. There are three reasonsfor this.这样写可以避免套用中的表达失误。
2.表示好处
1)It has thefollowing advantages.
2)It does us alot of good.
3)It benefits usquite a lot.
4)It isbeneficial to us.
5)It is of greatbenefit to us.
例如：
Books are likefriends.They can help us know the world better，and they can open our minds and widen our horizons.Therefore，reading extensively is of greatbenefit to us.
3.表示坏处
1)It has moredisadvantages than advantages.
2)It does usmuch harm.
3)It is harmfulto us.
例如：
However，everything divides intotwo.Television can also be harmful to us.It can do harm to our health and makeus lazy if we spend too much time watching television.
4.表示重要、必要、困难、方便、可能
1)It isimportant(necessary，difficult，convenient， possible)for sb.to do sth.
2)We think itnecessary to do sth.
3)It plays animportant role in our life.
例如：
Computers arenow being used everywhere，whether in the government，in schools or in business.Soon， computers will be found in every home，too.We have good reason to say that computers are playing anincreasingly important role in our life and we have stepped into the ComputerAge.
5.表示措施
1)We should takesome effective measures.
2)We should tryour best to overcome(conquer)the difficulties.
3)We should doour utmost in doing sth.
4)We shouldsolve the problems that we are confronted(faced)with.
例如：
The housingproblem that we are confronted with is becoming more and more serious.Therefore，we must take some effectivemeasures to solve it.
6.表示变化
1)Some changeshave taken place in the past five years.
2)A great changewill certainly be produced in the world’s communications.
3)The computerhas brought about many changes in education.
例如：
Some changeshave taken place in people’s diet in the past five years.The major reasons for these changesare not far to seek.Nowadays，more and more people are switching from grain to meat for protein，and from fruit and vegetable tomilk for vitamins.
7.表示事实、现状
1)We cannotignore the fact that...
2)No one candeny the fact that...
3)There is nodenying the fact that...
4)This is aphenomenon that many people are interested in.
5)However，that’s not the case.
例如：
We cannot ignorethe fact that industrialization brings with it .the problems of pollution.Tosolve these problems， we can start by educating the public about the hazards ofpollutionThe government on its part should also design stricter laws to promotea cleaner environment.
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