英语四级写作常用句型，即将考试了，写不出高分作文？积累的素材比较少，不知道去哪里收集素材吗？以下几种表达，马上用起来！
　　1. 表示原因1)There are three reasons for this.
　　2)The reasons for this are as follows.
　　3)The reason for this is obvious.
　　4)The reason for this is not far to seek.
　　5)The reason for this is that...
　　6)We have good reason to believe that...
　　例：There are three reasons forthe changes that have taken place in our life. Firstly, people’s living standard has been greatly improved. Secondly, most people are well paid, and they can afford what they need or like. Last but not least, more and more people prefer to enjoy modern life.
　　注：如写一个句子没有把握，可将其改写成两个句子。如：Great changes have taken place in our life. There are three reasons for this. 这样写可以避免套用中的表达失误。
　　2.表示好处1)It has the following advantages.
　　2)It does us a lot of good.
　　3)It benefits us quite a lot.
　　4)It is beneficial to us.
　　5)It is of great benefit to us.
　　 例：Books are like friends.They can help us know the world better，and they can open our minds and widen our horizons. Therefore，reading
　　extensivelyis of great benefit to us.
　　3.表示坏处1)It has more disadvantages than advantages.
　　2)It does us much harm.
　　3)It is harmful to us.
　　例：However, everything divides into two. Television can alsobe harmful to us. It can do harm to our health and make us lazy if we spend too much time watching television.
　　4.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：We cannot ignore the fact thatindustrialization 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.
　　5.表示比较1)Compared with A, B...
　　2)I prefer to read rather than watch TV.
　　3)There is a striking contrast between them.
　　例：Compared withcars, bicycles have several advantages besides being affordable. Firstly, they do not consume natural resources of PETrol. Secondly, they do not cause the pollution problem. Last but not least, they contribute to people’s health by giving them due physical exercise.
　　6.表示数量1)It has increased (decreased) from...to...
　　2)The population in this city has now increased (decreased) to 800, 000.
　　3)The output of July in this factory increased by15% compared with that of January.
　　例：With the improvement of the living standard，the proportion of people’s income spent on foodhas decreasedwhile that spent on educationhas increased.