because后接原因状语从句，because of应该接名词，代词，另外读音也不同、含义也不同；
because of是复合介词，其后可接名词、代词、动名词或由what引导的从句（但不是直接接从句）；
because是从属连词， 后接原因状语从句。
扩展资料
We couldnt understand them because they were talking in Chinese.
我们听不懂他们在讲些什么，因为他们说的是汉语。
His school work is suffering because of family problems.
由于家庭问题，他的'学业日渐退步。
Two players are out of the team because of injury.
两名队员因伤退出了比赛。
We have had to raise our prices because of rising costs.
因为成本日益上涨，我们不得不提高价格。
His school work is suffering because of family problems.
由于家庭问题，他的学业日渐退步。
