...现在分词,单数第三人称形式 play do go study be have like...答:过去式:加ed 现在分词:加ing 单三:加s play, played, playing, plays do, did, doing, does go, went, going, goes study,studied,studying,studies be, was/were,being, is have, had, having, has like, liked, liking, likes clean,cleaned,cleaning,cle...