2015大學英語四級作文常用句型：表原因
漫漫暑假除了放松度假之外，我們也不能忘記為下半年的四級考試做點準備工作呀。四級寫作每年都是考后大家吐槽的重點對象，其難度可想而知，有意參加下半年考試的考生還是乖乖來復習一點常用句型留作備用吧!
原因
1.A number of factors are accountable for this situation.
A number of factors might contribute to (lead to )(account for ) the phenomenon(problem).
2. The answer to this problem involves many factors.
3. The phenomenon mainly 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 explanations for it is that ...
8.One of the most common factors (causes ) is that ...
9.Another contributing factor (cause ) is ...
10.Perhaps the primary factor is that
11.But the fundamental cause is that ...
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