because引导原因状语从句,本身是个连词,连接两个完整的句子,because后面是原因。(要注意,because引导的从句只能做状语,不能做其他成分 eg:It is because... 就错了)同时,相较于as、since(同为连词表原因时),because的语气更强,也更正式;而for本是不是连词,不能连接两个句子,后面只能接短语。
eg:I was tired today because I stayed up late last night.
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。