5、othingcouldhavebeenbetter.(couldhavedone)4.SomethingterriblemusthavehappenedifLiChangwasnotcomingtoeatinhisrestaurantashealwaysdid.(musthavedone)5.HecouldnothaveYongHuigettingawaywithtellingpeoplelies!(can’t/couldn’thavesb.doing)功能1.SuggestionsandadviceWhatshouldwedo? Sh