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ArewashadishavefindcouldcanfoundwereInside在···里面Fire火safe安全can的用法口决情动can，表能力；和动原，不分离。变疑问，can提前；变否定，也简单，not跟在can后面。不管人称数变换，can的形式永不变。can的过去式是couldcan’t的过去式是couldn’t1.Werethereafire?Yes,therewere.2.Werethepeopleinsidethehouse?Yes,therewere.3.couldthefiremenseethepeople?No,theycouldn’t.4.Whatdidtheyhave?Theyhadaspecialdog.5.Didthisdogfindthepeople?Yes.Itfoundthepeople.6.Werethepeoplesafe?Yes,theywere.