Ⅰ. because 是連詞,后接句子, 是主句的直接原因,常用來回答由why 引導(dǎo)的特殊疑問句。如:
① Because he is ill, he is not here today. 因?yàn)樗×?,所以今天沒來。
② --Why are you in a hurry?
--Because I want to catch the first bus.
Ⅱ.because of 是復(fù)合介詞,后接名詞或代詞,相當(dāng)于名詞詞組。如:
He can’t come because of illness. 他生病了,所以沒來。
① Because he is ill, he is not here today. 因?yàn)樗×?,所以今天沒來。
② --Why are you in a hurry?
--Because I want to catch the first bus.
Ⅱ.because of 是復(fù)合介詞,后接名詞或代詞,相當(dāng)于名詞詞組。如:
He can’t come because of illness. 他生病了,所以沒來。

