What's this is her new bike?是病句吗?怎么改?

把is提前，把what's删了

如果 是一句话的话 就是
改成What's this？Is her new bike? 就没问题了

是的~
改后：
What's this ，is her new bike?
或者
where is her new bike?

是病句，有两个BE动词

Is this her new bike ?