I seep for 8 hours.这句话对吗?可以加for吗?I sleep for 8 hours every night.这样对不？这个体现的是什么语法知识呢，请问、、、

I seep for 8 hours.这句话对吗?可以加for吗?I sleep for 8 hours every night.这样对不？这个体现的是什么语法知识呢，请问、、、 I danced for three hours last I sleep for nine hours every night I play football for(a )two hours I ____ for two hours yesterday afternoon I slept for two hours 和 I has slept for two hours的区别是什么 i sleep for eight hours.中的for必须用吗? I watced TV for two hours last Sunday .对画线for two hours 提问. I do my homework for two hours every day .提问“for two hours” I have a basketball for two hours.对for two hours进行提问 I have math for two hours对画线部分提问(划线部分是for two hours ) after I read for two hours ,I felt _______(boring) I have to perform for u to 8 hours a day.填什么呀, I sleep nine hours every night.这句话表达正确吗?I sleep for nine hours every night.这两句没什么区别吗? 英语翻译i exercise for（）（）tow hours erery day After class I have s____ for two hours. After class I have -----for two hours.(填空） I slept only (for five hours) last night