through是我们很熟悉的词汇。它通常可以用作介词、副词和形容词。今天谈谈它作为介词时的用法。介词through是常用、常考的词汇。作为介词，它主要有四个常见的意思。下面分述。

1.through表示“穿过；通过；从…...一端至另一端；贯穿”。比如：

He got in through the window.他是从窗户进来的。The sand ran through my fingers.沙子从我的手指缝间漏了下去。

The path led through the trees to the river.这条小路穿过树林通向河边。The doctor pushed his way through the crowd.医生挤过人群。

The river flows through the city from south to north.那条河从南向北流经过城市。

2.介词through也可以表示“自始至终，从头到尾”的意思。比如：

They stayed in the summer villa through the summer.他们在夏季别墅待了整个夏天。The children are too young to sit through a concert.这些孩子太小，音乐会没完就坐不住了。

I'm halfway through (= reading) her second novel.她的第二部小说我看了一半了。

3.through也可以表示“凭借，因为，由于”。比如：

They often look at the summer night through a telescope.他们经常透过望远镜观看夏日的夜空。

You can only achieve success through hard work.你得孜孜不倦方能成功。

It was through him (= as a result of his help) that I got the job.我全靠他的帮助才找到这份工作。

The man refused help through pride.那人因为自尊而拒绝接受援助。

4. 介词through的第四个意思是“通过；穿过”。需要注意的是当through做“通过”讲时，一般多指通过某种障碍、某个阶段 或者mouge测试等等。比如：

Go through this gate, and you'll see the house on your left.你穿过这道大门，就看到左面的房子了。

He drove through a red light (= passed it when he should have stopped) .他开车闯了红灯。

First I have to get through the exams.首先我必须通过这些考试。