because與because?of的用法比較
?

■從詞性上看
because?是連詞，其后接句子；because?of?是復(fù)合介詞，其后接名詞、代詞、動(dòng)名詞、what?從句等。如：
I?didn’t?buy?it?because?it?was?too?expensive.?我沒(méi)有買是因?yàn)樗F了。
He?is?here?because?of?you?(that).?他為你(那事)而來(lái)這里。
He?lost?his?job?because?of?his?age.?由于年齡關(guān)系他失去了工作。
We?said?nothing?about?it,?because?of?his?wife’s?being?there.?因?yàn)樗拮釉谀莾?，我們?duì)此只字未提。
He?knew?she?was?crying?because?of?what?he?had?said.?他知道她哭是因?yàn)樗f(shuō)的話。
注意：because?of?之后可接?what?從句，但不能接?that?從句或沒(méi)有引導(dǎo)詞的句子。如：
他因病未來(lái)。
誤：He?didn’t?come?because?of?he?was?ill.
誤：He?didn’t?come?because?of?that?he?was?ill.
正：He?didn’t?come?because?he?was?ill.
正：He?didn’t?come?because?of?his?illness.
比較以下同義句：
他離開(kāi)了這家公司，是因?yàn)槔习逶跁?huì)上講的話。
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?yàn)橛袀€(gè)家就停止斗爭(zhēng)。
正：I?can’t?stop?fighting?because?I?have?a?family.
正：I?can’t?stop?fighting?because?of?having?a?family.
?

■從用法上看
because?所引導(dǎo)的從句除用作原因狀語(yǔ)外，還可用作表語(yǔ)。如：
It?is?because?he?loves?you.?那是因?yàn)樗麗?ài)你。
而復(fù)合介詞?because?of?所引導(dǎo)的介詞短語(yǔ)通常用作狀語(yǔ)而不用作表語(yǔ)。如：
他因雨缺席。
誤：His?absence?was?because?of?the?rain.
正：His?absence?was?due?to?the?rain.
正：He?was?absent?because?of?the?rain.
但是有時(shí)若主語(yǔ)是代詞(不是名詞)，也可以用?because?of?引出的短語(yǔ)作表語(yǔ)。如：
It?is?just?because?of?money.?那只是因?yàn)殄X的原因。
That?was?because?of?his?sickness.?那是因?yàn)樗〉脑颉? ? ? ? ? ? ??