作业帮clean的过去式为什么不双写n
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/09 03:35:25
studystudiedlooklookedcleancleanedbecomebecamewritewrote
过去式过去分词cleanedcleanedputputwateredwatered
没有,我学英语十几年了,从没听过还有这种形式的,learn才是这样
clean----cleaned---cleaned---cleaning---cleans;chat---chatted---chatted---chatting---chats
过去式：cleanedcleaneduptheunpaidbills.付清未付的账单
visited,closed,moved,finished,met,cleaned,went
cleanedvisitedhadgotreadwent再问：顺便再来几个live,stop,decide,hurry,knock,clean,meet给你加分再答：livedstoppeddecid
notclean直接在clean后加ed即可,变为notcleaned,not不用管它!
cleaned
被动语态再答：不是过去式，是过去分词再问：?再问：不懂哎再答：不懂没事，就是be加动词过去分词，表示被怎么怎么样再问：那就要加ed吗？再答：嗯，这是规则形式
首先helped是因为这个帮助是发生在过去,用过去时而helpsbdosth是个固定句型,表示帮助某人做某事所以后面clean用动词的原型再问：还有其他吗？再答：let后面也是加上动词原形letsbd
We'recleaned
finishedwashedtalkedcleanedcookeddroppedpulled
cleanscleanedcleaned
cleaned
cleaned
cleaned
这是help的固定用法,helpsbdosth或helpsbtodosth.在宾语从句中才要变.e.g.:Hesaidthathecleanedtheroom.
cleaned属于规则动词,直接加ed
后面加上ed