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?

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? after do sth.还是after doing sth. one's not doing 还是not one's doing 做某事获得成功是have success in doing th.还是have a success in doing sth. 34 到底是need sth done 还是 after doing 过去时after后加did还是doing? doing after school activites is还是 are good for us doing after school activites is还是 are good for us after doing sth 还是 after doing sth?他希望毕业后找到工作He hopes to find a job after gradute还是after graduting?为什么? 介词+宾格+动词ing还是动词?如:After them doing sth 还是After them do sth Let’s doing some cleaning now是do还是doing suggest mary's doing sth还是suggest mary doing sth? resist sb doing还是resist sb's doing admit one's doing还是admit sb doing? It’s fun to do还是doing it's adj+to do还是doing? your son's trouble will be all right by lunch time .可以说after lunch time 1,by 2.in 3.after 4.at选by 还是after,我知道正确答案是by,可没有办法解释 为什么不能选after,感觉意思也通顺，是习惯上这么说呢，还是af This hit home after September 11th disaster on Jimmy's birthday什么意思