句型转换 1. Sam is in Class One. (改为一般疑问句，并作
题型：句型转换
问题：
句型转换
1. Sam is in Class One. (改为一般疑问句，并作肯定回答)
—_____ Sam in Class One?
—Yes, he _____ .
2. He is my friend. (改为否定句)
He _____ my friend.
3. Helen and Wang Dong are 12 years old. (改为否定句)
Helen and Wang Dong _____ 12 years old.
4. They are English. (改为一般疑问句，并作否定回答)
—_____ they English?
—No, they _____ .
5. Helen is from America. (对划线部分提问)
_____ Helen from?