Lily has been walking for two hours. (一般疑问句)
________ Lily been ________ for two hours?
The Greens will be back in three days. (对划线部分提问)
________ ________ will the Greens be back?
He is so tired that he can’t walk any more. (同义句转换)
He is ________ tired__________ walk any more.
Would you mind turning off the light? (变否定句)
Would you mind_______ ________ off the light?
在公共场所抽烟是不被允许的。
Smoking isn’t allowed _________ __________.