he`s been skating for four hours 改为否定句
he`s been skating for four hours 改为否定句
Sam has been skating for four hours.改为否定句
Next is Sam ,and he has been skating for four hours
I skated for four hours与I have been skating for four hours的区
The skating marathon has been going for five hours.改为同义句 The
He started skating four years age.(改为同义句)
she's been skating for five hours 为什么is been for都不用翻译
Alison has been skating for five hours.
Sam has been swimming for fuor hours (改为否定句)
They have been skating for five hours 同义句 They have been ska
将he has been playing comquter games for two hours改为同义句
The skating marathon has been going for five hours now,and s