英语四级作文万能句型：原因

　　距离2013年英语四级考试开考的日子越来越近了，作文作为英语四级考试当中非常重要的一块内容，各位考生应当重视起来。平时多加练习，多加积累，在考场上才能写出精彩的作文。
 

　　1.A number of factors are accountablefor this situation.

　　A number of factors might contributeto (lead to )(account for) the phenomenon (problem).

　　2.The answer to this problem involvesmany factors.

　　3.The phenomenonmainly stems from the fact that...

　　4.The factors that contribute to this situation include...

　　5.The change in ...largely results from the fact that...

　　6.We may blame ...,but the real causes are...

　　7.Part of the explanationsfor it is that ...

　　One of the most common factors (causes .is that ...

　　Another contributing factor (cause .is ...

　　Perhaps the primaryfactor is that …

　　But the fundamental cause is that