I heard he is singing.是病句么?

Question

能不能改为I heard that he is singing.

Answer 1

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 singing.
但是这个句子不够简洁。应该简单而直白地表达为：
I heard him singing.
此种类似的词有see,smell等

Answer 2

错了
有俩种改法
1，把I heard he is singing改为I heard he was singing 是一个省啰了that的宾语从句
2，把I heard he is singing改为I heard him singing是用了 hear sb. doing sth的句型

Answer 3

正确的应该是I heard him singing.

Answer 4

有hear sb doing sth和hear sb do sth ，应该为I heard he singing.

Answer 5

是，因为heard是过去式，而is singing是正在，互相矛盾。

Answer 6

过去进行时，把is 改为was