連詞for的用法

1、for用作連詞，主要表示理由，用于引起的分句對前面的話進(jìn)行解釋，常用逗號把它和前面的分句分

開。如：

She was angry, for she didn’t know French. 她生氣了，因?yàn)樗�不懂法語。

He must be out, for there is no light in the room. 他準(zhǔn)是出去了，因?yàn)槲堇餂]有燈。

He shook his head, for he thought differently. 他搖了搖頭，因?yàn)樗�有不同想法�?/p>

The days were short, for it was now December. 白天很短，因?yàn)檫@時(shí)已經(jīng)是十二月。

We rarely stay in hotels, for we can’t afford it. 我們很少住旅館，因?yàn)槲覀冏〔黄稹?/p>

You needn’t have watered the flowers, for it is going to rain. 你本不必澆那些花，因?yàn)榫鸵�下雨了�?/p>

He took the food eagerly, for he has eaten nothing since dawn.

他狼吞虎咽地吃了起來，因?yàn)樗麖奶炝辆蜎]吃過東西。

He was busy packing, for he was leaving that night.

他那時(shí)正忙著打點(diǎn)行李，因?yàn)槟翘焱砩纤�就要走了�?/p>

She does not go out in the winter, for she feels the cold a great deal.

她冬天不出門，因?yàn)樗�特別怕冷。

2、for表示結(jié)果通常不能放句首，也不能單獨(dú)使用。

for表示原因時(shí)的四個(gè)“不能”

1、for引導(dǎo)的從句不能位于它所解釋的動(dòng)詞之前：

Because it was wet he took a taxi. 因?yàn)橄掠辏�他叫了一輛出租車。(這里不能用for)

2、for引導(dǎo)的從句不能位于not, but或任何連詞之后：

He stole, not because he wanted the money but because he liked stealing.

他偷東西，并不是因?yàn)樗�想要錢，而是他有這種毛病。(這里不能用for)

3、for引導(dǎo)的從句不能用于回答問題：

—Why did you do it? 你為什么這么做?

—I did it because l was angry. 因?yàn)槲疑鷼獠胚@么做的。(這里不能用for)

4、for引導(dǎo)的從句不能單單用來復(fù)述已講過的話，而必須包括新的內(nèi)容：

He spoke in French. She was angry because he had spoken in French.

他講法語。因?yàn)樗�講法語，她生氣了。(這里不能用for)

但是說：

She was angry, for she didn’t know French.

她生氣了，因?yàn)樗�不懂法語。(這里用for是正確的，也可用because)

注意：之所以有這些用法上的限定，其理由是for引導(dǎo)的從句不能直接說明某一特定動(dòng)作發(fā)生的原因，而只能

提供一些起幫助解釋作用的附加說明。例如：

The days were short, for it was now December. 天短了，現(xiàn)在已是12月了。

He took the food eagerly, for he has eaten nothing since dawn.

他狼吞虎咽地吃了起來，因?yàn)樗麖奶炝辆蜎]吃過東西。

When I saw her in the river I was frightened. For at that point the currents were dangerous.

我看見她在河里時(shí)，嚇壞了。那個(gè)地方水流非常危險(xiǎn)。

注意：在口語中，for從句前常稍停一下。在筆語中，在此處常有一個(gè)逗號。有時(shí)也用一個(gè)句號斷開，如最后

一個(gè)例子所示。上面三個(gè)例句中也可用becatse, 但用for更好些。

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