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have/has的用法口诀动词have表示“有”，位置就在主语后。“三单”主语用has，其他人称用have。一般问句句首do/does添。否定句子也一样，don’t/doesn’t主语后面站。1.Adoghasfourlegs.2.Ourschoolhasalibrary.3.Wehave37chairsinourclassroom.4.Mysisterhasanicetoycar.5.Doesthatgirlhaveadoll?6.DoTomandhisbrotherhaveabigbedroom?7.Idon'thaveamodelplane.8.Lilydoesn'thaveadoll.