class="" 这句话错在哪?

class="" 这句话错在哪? He like playing football after class.这句话错在哪? everyone in our class is on vacation last week这句话错在哪 I don't know how many students are there in his class.这句话错在哪 they are in same class这句话错在哪里?怎样正确修改 Please listen your teacher in class这句话错在哪儿? There are fourty students in my class.这句话的错误在哪里? class类的问题 这句话意思 如果把class写成Class或者CLASS是错误的这句话对吗 He is in class Nine,grade seven?这句话哪里错了,并改过来. I am in class two ,Grade one .问下,这句话哪里错了 "Who is in the class room?None."请问这句话哪里错了?