He is sale a book,病句吗

问题描述:

He is sale a book,病句吗

是病句,sale是名词,不能那样用。

his book is on sale
he is selling a book

恩 is后面 要是ing形式

不对,sale是名词,我们可以说on sale
建议用he is selling a book.

是的.正确的he is selling a book.