在英語中，because與because of的用法有很多人都分不清，以下就是給大家整理出來的because與because of在句子中的用法比較。

從詞性上來講

because是連詞，其后接句子；becauseof是復(fù)合介詞，其后接名詞、代詞、動名詞、what從句等。because 和because of 都可以用來表原因（引出從句或者短語做原因狀語）如：

He is here because of you (that).他為你(那事)而來這里。

He los this 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.因為他妻子在那兒，我們對此只字未提。

He knew she was crying because of what he had said.他知道她哭是因為他說的話。

注意：because of之后可接what從句，但不能接that從句或沒有引導(dǎo)詞的句子。如：

他因病未來。

誤：He didn’t come because of he was ill.

誤：He didn’t come because of tha the was ill.

正：He didn’t come because he was ill.

正：He didn’t come because of his il lness.

because 是從屬連詞， 后接原因狀語從句

because of 是個短語介詞，不可以引導(dǎo)原因狀語從句，而應(yīng)該接名詞，代詞等

從用法上來講

because所引導(dǎo)的從句除用作原因狀語外，還可用作表語。如：

It is because he loves you.那是因為他愛你。

而復(fù)合介詞because of所引導(dǎo)的介詞短語通常用作狀語而不用作表語。如：

他因雨缺席。

誤：His a bsence was because of the rain.

正：His absence was due to the rain.

正：He was absent because of the rain.

但是有時若主語是代詞(不是名詞)，也可以用becauseof引出的短語作表語。如：

It is just because of money.那只是因為錢的原因。

That was because of his sickness.那是因為他生病的原因。