HELP.的过去式简单死了.快回答

help-helped
很容易的,下面介绍一个学习动词形态的方法,希望对你有用处!
动词的基本形式
动词除原形外,还有过去式、过去分词和现在分词三种形式.
（一）过去式和过去分词的构成
1．一般情况下在原形后加-ed.如：work-worked,help-helped.
2．以e结尾的单词,在原形后加-d.如：like-liked,joke-joked,hope-hoped.
3.以"辅音字母+y"结尾的单词,变y为i再加-ed.如：study-studied,carry-carried,copy-copied.
4．以重读闭音节、末尾只有一个辅音字母结尾的单词,双写末尾的辅音字母再加-ed.如：stop-stopped,prefer-preferred,admit-admitted,plan-planned.
有些动词的过去式和过去分词有特殊的形式.
cost-cost-cost
meet-met- met
catch-caught-caught
rise-rose-risen
drive-drove- driven
get-got-got/gotten
leave-left-left
smell-smelt/smelled-smelt/smelled
tell-told-told
take-took-taken