改病句How many student are there in the playground?
问题描述：
改病句How many student are there in the playground?
答
" student " 应该加" s " ，因为问多少学生、若是只有1个就不用问有多少个了。" in the playground " 有错，应该为“on the playground ”
答
student 改成students
答
How many students are there in the playground?
其实就是把student变为复数形式,加个"S"就好了.
答
STUDENT 改 STUDENTS
IN 改 ON