为什worry的现在分词worrying不改y,而过去分词worried又要改y为i?

为什worry的现在分词worrying不改y,而过去分词worried又要改y为i? worry的现在分词到底是worrying还是worring Faye thinks worrying about their jobs ...这里的worry为什么是ing形式 worry,comb,smile,bark,wear 的现在分词, worry的现在分词,过去分词,动词过去时,名词,第三人称单数 look make hit drive play get learn bring worry stop的现在分词 finish.cry.start.plan.run.buy.worry.try.的现在分词, worry有没有现在分词?有的 写出来 It's no use ____about your work .填worrying还是to worry?要权威的, worry是直接加ing吗?worrying? don't worrying与don't worry cook,visit,watch,piay,live,worry,leave,read,sing,buy,take的现在分词可不可以在端午节前完成 write的现在分词写出现在分词 请教一道关于非谓语的选择Colleen Bowser has had many sleepless nights,___about the safety of her daughter,who is living alone in another city.A.worrying B.to worry C.being worried D.having worried但词组不是be worried about么?为什 laugh、worry、agree、travel、invite、invent的过去分词 clean的现在分词 drink的现在分词 clean的现在分词