because与because of的用法

① because是连词， “因为”，用来连接原因状语从句

如：

I did it because he told me to (do it).

我做这事是因为他叫我做的。

Just because I don’t complain, people think I’m satisfied.

因为我没发牢骚，人们就以为我心满意足了。

② because of是介词短语，“因为(某人/某事物)；由于”，在句中作状语

如：

They are here because of us.

他们是为了我们而来到这里的。

He walked slowly because of his bad leg.

他走得慢是因为腿有毛病。