Unit 13 The Dead Rabbit Came Back Part 3 Language in Use,Write out the past form of these verbs,play, want, kill, clean, call, walk, ask,decide, live,smile,dance,love,bury, worry, study, carry,stop, plan,am, are, have, go, say, do, tell, think, find, put, take, come, sleep,run, make, see,动词过去式的变化规则,规则动词的过去式变化规则： 一般情况下直接加-ed；在不发音的e结尾的动词后只加-d； 以“辅音字母+y”结尾的动词，变y为i再加-ed； 以重读闭音节结尾，且末尾只有一个辅音字母的动词， 先双写该辅音字母，再加-ed,不规则动词的过去式形式： 如 do-did, go-went,take-took,come-came 等,Do Exercise,P104: 2 P105: 5 P106: 1,S
