2. 引導條件狀語從句的從屬連詞。這類連詞主要有if, unless, as [so] long as, in case 等。如：

Do you mind if I open the window?我開窗你不介意吧?

Don’t come unless I telephone. 除非我打電話，否則你別來。(from www.hz123456.com)

As long as you’re happy，it doesn’t matter what you do. 只要你高興，你做什么都沒關系。

In case it rains they will stay at home. 萬一下雨，他們就呆在家里。

注意：在條件狀語從句中，通常要用一般現在時表示將來意義，而不能直接使用將來時態。不過，有時表示條件的 if之后可能用 will，但那不是將來時態, 而是表示意愿或委婉的請求(will為情態動詞)。如：

If you will sit down for a few moments, I’ll tell the manager you’re here. 請稍坐, 我這就通知經理說您來了。

3. 引導目的狀語從句的從屬連詞。主要的有 in order that, so that, in case, for fear等。如：

He raised his voice so that everyone could hear. 他提高了嗓音，以便每個人都能聽見。

Take your umbrella (just) in case it rains. 帶上雨傘，以防下雨。

She repeated the instructions slowly in order that he should understand. 她把那些指示慢慢重復了一遍好讓他聽明白。

4. 引導結果狀語從句的從屬連詞。主要的有so that, so…that, such…that等。如：

I went to the lecture early so that I got a good seat. 我去聽演講去得很早, 所以找個好座位。

I had so many falls that I was black and blue all over. 我摔了許多跤，以致于全身都是青一塊紫一塊的。

He shut the window with such force that the glass broke. 他關窗子用力很大, 結果玻璃震破了。(from www.hz123456.com)

5. 引導原因狀語從句的從屬連詞。主要的有because, as, since, seeing (that), now (that), considering (that) 等。如：

He distrusted me because I was new. 他不信任我，因為我是新來的。

As you are sorry，I’ll forgive you. 既然你悔悟了，我就原諒你。

Since we’ve no money, we can’t buy it. 由于我們沒錢，我們無法購買它。

Seeing that he’s ill he’s unlikely to come. 因為他病了，他大概不會來了。

Now that she has apologized, I am content. 既然她已經道了歉, 我也就滿意了。

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