肯定句：There are ten students in the classroom.
否定句：There aren't ten students in the classroom.
一般疑问句：Are there ten students in the classroom?
肯定回答：Yes， there are.
否定回答： No， there aren't.
(注意：There be句型要用就近原则哦。ten students复数，所以是there are, 不能用there is 。疑问句就把be提前即可。否定句在be后加not)
