求动词过去式：结尾直接加ed 结尾直接加d 结尾去y加ied 双写最后一个字母加ed 及不规则变化

pick-picked kick-kicked count-counted paint-painted protect-protected fill-filled call-called turn-turned play-played look-lookedname-named promise-promised like-liked love-loved live-lived use-used p...