it happened after three days这个为什么用过去时呢?

after doing s.th还是after do s.th?在书上看到两句话：1、After listening to it2、After they listen to it为什么一个是 doing s.th 一个是do s.th? it happened after three days这个为什么用过去时呢? What did the moose do after it went into the bakery?和What happened at last? 这句话（英语）有错吗?it happened in the year of may 18th,2010.不知道这句话有没有错.还是应该这样写,it happened in the day of may 18th,2010. What happened on Dec . 25th,1928? what day will it be the 2009th day after May 1,2009 which is Friday? Don't take it after September 10th ,2010,这句的意思 Nobody knew what had happened __they were told about it.A.when B.as C.after D.until how does it ___ that you did notreport it until two days after it had happened?a:come out b:come acrossc:come off d:come about After the 13th death,14th is Has not 这句话的take是什么意思Something strange happened after i drove a long way and found it was not the correct road that i wangted to take 英语语法题 求各路大神回答=n=A great earthquake happened on the afternoon of May 12th in Sichuan,thousands of deaths A.to cause B.causing Ccaused Dhas caused为什么不选C呢 我的理解是主语是earthquake 定语happened on the after It happened ( ) a rainy night 介词填空 I Was There When It Happened 歌词 It happened on that p____ day. 翻译 that's exactly how it happened I thought it just kinda happened. it happened that cows s___in the garden