1.because 是连词,其后接句子；because of 是复合介词,其后接名词、代词、动名词、what 从句等.如：I didn’t buy it because it was too
expensive.我没有买是因为它太贵了.He is here because of you (that).他为你正：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.beca 20pt; mso-char-indent-count:use 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：引出的短语作表语.如：It is just because of money.那只是因为钱because和because of的意思都是：因为,由于.但是在用法上又有不同.
because：后加从句.
比如：She doesn't go to school because she is ill.她没来上学因为她生病了.在这句话中.
she is ill就是从句.所以because后面就是接从句.
而再来看because of.
because of：后加代词/名词/动词的ing形式.
还是拿刚才那句话来比较.用because of来代替后.就是：She doesn't go to school because of her illness.同样的一个意思.接连的却不同.
her illness是名词.
这就可以说明.because of后接代词/名词/动词的ing形式.
