越来越好
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。
