All the students were very happy 变为否定句、一般疑问句、做肯、否定回答
问题描述：
All the students were very happy 变为否定句、一般疑问句、做肯、否定回答
答
否定句：All the students were not very happy.
一般疑问句：were all the students very happy?
Yes,they were.
No,they were not.
答
否定句：All the students were not very happy.
一般疑问句：Were all the students very happy?
肯定回答：Yes, they were.
否定回答：No, they weren't.
答
All the students weren't very happy .Were all the students very happy?
Yes,they were,No,they weren't.