hourago

washe____(do)hishomeworkhalfanhourago填：doing分析be+doing进行时,半小时前,故用过去进行时.加油!不明白再问!doing，was表明了后面要用过去进行时，故将do变成doing。

改写句子Mymotherwillbuymeabook.(anhourago)Iamindeijingnow.(lastyear)Wehadlunvhathome.(now)Mymotherboughtmeabookanhourago.Iwa