它们的过去式、过去分词 帮忙写一下谢谢了 过去式：should rang hurried stayed tried changed picked entered knocked hurried traveled planned stopped destroyed 故去分词：should rung hurried stayed tried changed picked entered knocked hurried tra.
enter的现在分词是什么，过去式呢？
bake，boil，discuss，enter，fry，keep，mean，steam的过去式 过去分词 现在分词是什么 依次为现在分词-过去式-过去分词：bake-baking-baked-bakedboil-boiling-boiled-boileddiscuss-discussing-discussed-discussedenter-entering-entered-enteredfry-frying-fried-friedkeep-keeping-kept-keptmean-meaning-meant-meantsteam-steaming-steamed-steamed
