雅思大作文里，因果关系的运用对于论证和逻辑，都有非常的重要意义.关于因果关系的表达同学们都很熟悉，无非是BS(because / so)，而且大家也一定很清楚的知道BS在英语中，用了前者就不能用后者的道理.例如

Because further education has become more accessible for a wider range of people， an increasing number of people have degrees

Further education has become more accessible for a wider range of people， so an increasing number of people have degrees.

但是除了BS之外，还有很多其它表示因果关系的表达，具体如下：

Because系列(表原因)

1. because of ： because后接的是一个句子(主谓宾);because of 后一般直接跟名词.

例如：

Because of the increasing number of machine-and as we noted before， machines magnify human effort-then anyone using a machine can

get a higher wage than anyone not using a machine.

2. as / since (除了"因为"外，还有"自从"的意思，使用时要注意避免歧义)

Hours spent on commuting， traffic jams， and fights for parking should diminish， since workers make fewer journeys or work staggered hours

Unfortunately， as the number of people living in the city increases， so do the different problems associated with population growth. (注意此句中的so不表示"所以"，而是"…也…"的意思)

3. thanks to (positive situations 通常适用于结果好的时候)

Thanks to new technology， it's easier than ever to work remotely.

due to (negative situations通常使用与结果不好的时候)

owing to / attributable to /on account of

Due to /… / On account of extreme weather conditions， damage to property occurs.

4.当原因需要的表达较多时，我们还可以把以上表达改写为原因状语从句，使用thanks to the fact that / due to the fact that /owing to the fact that 或者on the grounds that

Will we live longer merely due to the fact that / on the grounds that technology， if implemented properly， will take stress away from our lives

5. caused by / result from 也表原因

Many car accidents were resulted from / caused by a lack of guardrails