because用作連詞，基本意思是“因?yàn)椤?強(qiáng)調(diào)直接造成某種結(jié)果的理由和原因?？梢龑?dǎo)狀語(yǔ)從句和表語(yǔ)從句，也可用于強(qiáng)調(diào)句和省略句。

1.because的基本意思是“因?yàn)椤?強(qiáng)調(diào)直接造成某種結(jié)果的理由和原因,所引導(dǎo)的原因狀語(yǔ)從句多置于主句之后,有時(shí)為了強(qiáng)調(diào),也可置于主句之前,并用逗號(hào)與句子的其他部分隔開(kāi)。

I study because I want to learn.

我學(xué)習(xí)是因?yàn)槲蚁雽W(xué)到知識(shí)。

Just because they make more money than I do, they think they are so superior.

只因?yàn)樗麄儝赍X(qián)比我多,他們就認(rèn)為自己高人一等。

2.because還可用來(lái)引導(dǎo)讓步狀語(yǔ)從句,這時(shí),通常用于否定句或疑問(wèn)句中。

Because the husband is vile—should the wife be vile too?

做丈夫的不正派,是不是做妻子的也應(yīng)不正派呢?

3.because有時(shí)還可引導(dǎo)表語(yǔ)從句。

This is because the earth is travelling round the sun.

這是因?yàn)榈厍蛟趪@太陽(yáng)運(yùn)轉(zhuǎn)。

This is because the direct current flows in a wire always in one direction.

這是由于直流電在導(dǎo)線內(nèi)總是沿著一個(gè)方向流動(dòng)。

4.because可用于強(qiáng)調(diào)句。

It is because he is honest that we like him.

是因?yàn)樗\(chéng)實(shí)我們才喜歡他。

5.not...because...結(jié)構(gòu)有時(shí)否定主句，有時(shí)否定從句，須根據(jù)上下文正確判斷。一般來(lái)說(shuō)，否定主句時(shí)because前多有逗號(hào)，而如果because前有just，則多半否定從句。

I didn't go, because I was afraid.

我沒(méi)有去是因?yàn)榕隆?/p>

Because I was ill,I didn't go to school yesterday.

因?yàn)椴×?所以昨天我沒(méi)有去上學(xué)。

6.because可用于省略句

The room was uncomfortable because too hot.

因?yàn)樘珶?，這房間很不舒服。