1ThesilkmadeinChinasellswell.｛silk与made中间为什么不加S?｝2Wemightneedmorefood,dependingonhowmanypeoplewillcome.｛depend后为什么要加ing?｝3DoyoufinditeasytoencouragetheboytospeakEnglish?{boy后为什

　　1ThesilkmadeinChinasellswell.｛silk与made中间为什么不加S?｝2Wemightneedmorefood,dependingonhowmanypeoplewillcome.｛depend后为什么要加ing?｝3DoyoufinditeasytoencouragetheboytospeakEnglish?{boy后为什么又加了一个to?}4JameswiththeGreesisleavingfortheDragonTowerifitisn'trainytomorrow.{1这里的is为什么不可以换成are?2isn't为什么不可以换成doesn't?}