雅思写作须掌握的介词短语的用法

英语当中介词也发挥着重要的作用，要想利用介词来扩展句子，首先要明白介词的用法和功能。介词通常会跟名词搭配组成介宾短语。介宾短语可以修饰名词，也可以修饰动作，还可以给句子补充信息或者解释原因。

介宾短语作定语修饰名词：

Medical staff from different areas went to Wuhan to provide assistance and support.

这里的介词短语from different areas就是做定语，修饰medical staff。

介宾短语修饰动作：

I usually go running around the park on weekends.

这里的around the park和on weekends分别就是介词短语做地点状语和时间状语

修饰动作一般就是交代动作发生的时间，地点，原因等。

修饰整个句子会用到一些短语，比如in terms of（在...方面,就...而言）:

The concert was a huge success, in terms of the number of people who watched it and its impact on public awareness of environmental problems.

就观看人数和对公众环保意识的影响力而言，这场音乐会是一个巨大的成功。

给句子补充信息经常用到一个词with：

In 1979 beef was by far the most popular of these foods, with about 225 grams consumed per person per week.

1979年，牛肉是这些食物中的，平均每人每周食用225克。

The remaining 40 units were produced largely from oil and nuclear power, with hydro contributing only 5 units.

剩下的40单位的电主要由石油和核能生产，其中水电仅占5个单位。

with sth done或者with sth doing，是给句子补充细节信息的重要手段。

解释原因再举一例：With all work finished, he went to the cinema with his girlfriend.

相信掌握以上介词的雅思写作常用用法,会让大家在表达时跟多变自如。

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