关于seesbdo或doing的用法用动词的适当形式填空.1.ThismorningIsawhim_________(do)hishomeworkwhenIwentintohisroom.2.ThismorningIsawhim_________(do)hishomeworkforsometimeandthenplaybasketball.3.WhenIwason

　　关于seesbdo或doing的用法

　　用动词的适当形式填空.

　　1.ThismorningIsawhim_________(do)hishomeworkwhenIwentintohisroom.

　　2.ThismorningIsawhim_________(do)hishomeworkforsometimeandthenplaybasketball.

　　3.WhenIwasonmywaytoschoolthismorning,Isawtwothieves_________(run)outofthebank.

　　4.Ioftenseetheboys_________(play)footballontheplayground.

　　5.Isawhim_________(walk)intothebuildingatthattime.

　　帮我具体解释一下这些句子的do的用法!是不是和在什么时段有关系!总之,具体些!我当晚就要解决,