be,break,buy,can,come,cost,do,drive,fall,get,give,go,hear,know,le...答:was/were,broke,bought, could came cost did drove fell got gave went heard knew left paid put rang ran said
...arrive,try,prefer,cost,leave,see,drive,help,save,stop,give,ho...答:visit---visited arrive---arrived try--- tried prefer--- preferred cost---cost leave--leaf see---saw drive---drived help---helped save---saved stop---stoped give---gave hold---held know---knew feed---fed write---wrote(以上均为过...