Simone
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<(那事)而来这里。
He lost his job because of his age. 由于年龄关系他失去了工作。
We said nothing about it, because of his wife’s being there. 因为他妻子在那儿，我们对此只字未提。
He knew she was crying because of what he had said. 他知道她哭是因为他说的话。
注：
because of 之后可接what 从句，但不能接that 从句或没有引导词的句子。
如：他因病未来。误：He didn’t come because of he was ill.
He didn’t come because of he was-font-family: 'Times New Roman'">
误：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.
比较以下同义句：
他离开了这家公司，是因为老板在会上讲的话。
正：He left the coar-indent-count: 2.0">
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。
前者是正确的，后者是一个错误的用法。
“because of”的意思是“因为，由于”。例句：The old man was blind because of cataracts.老人因患白内障而双目失明。
后者是一个错误的用法，如果强调原因是“你”的话，应该在because后面加上of。如果是想说明具体原因的话，可以用you来组成一个表明原因的句子。比如：Because you have come here.因为你已经来到了这儿。
