1、1．表示原因 1）There are three reasons for this． 2）The reasons for this are as follows． 3）We have good reason to believe that．．． 4) There are several causes for this significant growth in...， firstly .... secondly...， last but not least (finally)... 5) There are many (different/several) rea
2、sons for this change (decrease/growth) of... For one thing，...For another，.... ，In addition，... 6). The chief reason why...is that... 2．表示好处 1）It has the following advantages． 2）It benefits us quite a lot． 3）It is of great benefit to us． 例如：Books are like friends．They can help us know th
3、e world better，and they can open our minds and widen our horizons．Therefore，reading extensively is of great benefit to us． 3．表示坏处 1）It has more disadvantages than advantages． 例如：However，everything divides into two．Television can also be harmful to us．It can do harm to our health and make
4、us lazy if we spend too much time watching television． 4．表示重要、必要、困难、方便、可能 1）It is important（necessary，difficult，convenient， possible）for sb．to do sth． 2）We think it necessary to do sth． 3）It plays an important role in our life． 例如：Computers are now being used everywhere，whether in the gov
5、ernment，in schools or in business．Soon，computers will be found in every home，too．We have good reason to say that computers are playing an increasingly important role in our life and we have stepped into the Computer Age． 5．表示措施 1）We should take some effective measures． 2）We should try our
6、 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 solv
7、e it． 6．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
