I heard he is singing.是病句么?

问题描述:

I heard he is singing.是病句么?
能不能改为I heard that he is singing.

这是一个病句,错误的原因在于时态.句子的结构是一个简单的从句.I heard + that引导的从句.这里that省略了,这是可以的.但是,主句是过去式,相应的从句的一般现在时应该为一般过去时.正确的为:I heard (that) he was s...