三、解释原因、分析影响的常用句型及例句说明1. Everybody knows that...
2. It can be easily proved that...
3. It is true that...
4. No one can deny that...
5. One thing which is equally important to the above mentioned is...
6. The chief reason is that...
7. We must recognize that...
8. There is no doubt that...
9. I am of the opinion that...
10. This can be expressed as follows:
11. To take..， for an example ....
12. We have reason to believe that...
13. Now that we know that...
14. Among the most convincing reasons given， one should be mentioned...
15. The change in... largely results from the fact that...
16. There are several causes for this significant growth in...， first .... second...， finally...
17. A number of factors could account for the development in...
18. Perhaps the primary reason is...
19. It is chiefly responsible for...
20. The reasons for..， are complicated. And probably they are found in the fact...
21. There are several possible reasons， except that...
22. Somebody believes/ argues/ holds/ insists/ thinks that...
23. It is not simple to give the reason for this complicated phenomenon...
24. Different people observes it in different ways.
例句说明
1. There are many (different/several) reasons for this change (decrease/growth) of... For one thing，...For another，.... ，In addition，...
例:There are several reasons for his decision of studying law. For one thing， he is very interested in social affairs and it seems the best way to enable him to engage in these activities. For another， his father is a lawyer， who has always encouraged him to do something similar. In addtion， he is sure that he can get a job after graduation.
2. A number of factors contribute to (something/doing)—. ...... and...
例: A number of factors contribute to changing moral values--self-indulgence， the lack of social consciousness and the degeneration of the society itself.
3. We may (regard/think of/take/consider) the (phenomenon/decrease/development) as a (n) (sign/evidence/symbol) of...，but the truth is that...
例：We may take the change as a sign of social development， but the truth is that it will only lead to social corruption.
4. The explanation for the phenomenon of ... involves many (different/complicated) factors.例:The explanation for the phenomenon of the rising teenage suicide rate involves many complicated factors. Some attribute the rise to an overemphasis on early success， others point to mounting peer pressure， and still others to confusion over changing social values.
5. The reasons for ... are many， but for the most part center on...
例:The reasons for poverty are many， but for the most part center on illiteracy， the lack of opportunities and in some cases pure laziness
