他离开了这家公司，是因为老板在会上讲的话。

正：He left the company because of what the boss said at the meeting.

正：He left the company because of the thing that the boss said at the meeting.

我不能因为有个家就停止斗争。

正：I can’t stop fighting because I have a family.

正：I can’t stop fighting because of having a family.

2. because 所引导的从句除用作原因状语外，还可用作表语。如：

It is because he loves you. 那是因为他爱你。

而复合介词 because of 所引导的介词短语通常用作状语而不用作表语。如：

他因雨缺席。

误：His absence was because of the rain.

正：His absence was due to the rain.

正：He was absent because of the rain.

但是有时若主语是代词(不是名词)，也可以用 because of 引出的短语作表语。如：

It is just because of money. 那只是因为钱的原因。

That was because of his sickness. 那是因为他生病的原因。

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