i danced for an hour.

i danced for an hour. I can stay an hour.还是I can stay for an hour? I danced for three hours last for an hour 过去式几种表达的区别I waited for an hour.I had waited for an hour.I had been waiting for an hour.它们有什么不同? I sometimes play basketball for half an hour同义句改half an hour 为空空 I usually walk for ______half an hour every day. I ususlly go( )(walk)for half an hour I will have lunch and then s------- for an hour. I have been there for half an hour.啥意思 After lunch,I sleep for an hour ( ) (one) I use your bike for half an hour . I cleaned the room for an hour根据答句写问句 I go running for half an hour every morning?对for half an hour 提问,马上就要 i usually go running for half an hour对划线部分提问线是for half an hour I play basketball for half an hour every day...对for half an hour 提问.该怎样回答急 After school I have football class for an hour.(就画线部分提问）（for an hour） I waited for the train （for） over an hour.I waited for the train for over an hour.和I waited for the train over an hour.前句有for,后句没for,那句正确啊?