Sam has been skating for four hours.改为否定句
Sam has been skating for four hours.改为否定句
he`s been skating for four hours 改为否定句
Next is Sam ,and he has been skating for four hours
Sam has been swimming for fuor hours (改为否定句)
The skating marathon has been going for five hours.改为同义句 The
Alison has been skating for five hours.
I skated for four hours与I have been skating for four hours的区
The,has,skating,marathon,been,for,going,hours,five,now.(连词成句
The skating marathon has been going for give hours now.
改句,填空Sam has fout pears.Jim has four pears,too.改为 Sam has __
将he has been playing comquter games for two hours改为同义句
she has been playing basketball for 2hours (改为同义句)