句型转换
He has to study for a test. (一般疑问句)
_____ he _____     to study for a test?
We’ll come back in an hour.(划线提问)
________ ________will you come back?
I think there will be more pollution in the future.(否定句）
I                there       be more pollution in the future.
Li Lei is so young that he can’t go to school. (合并为一句)
Li Lei is__________ young  __________ go to school.
You can’t pass the exam if you don’t work hard.(同义句）
You can’t pass the exam         you work hard.