upon doing sth.有人说｛在……的时候｝,有人说｛一做某事,就……｝ 到底哪个对?

upon doing sth.有人说｛在……的时候｝,有人说｛一做某事,就……｝ 到底哪个对? 有decide doing sth.吗?为什么书上写decide on(upon) sth./doing sth.? upon+doing sth有“一.就.”的意思吗? upon doing have sth doing / have sth to do/ have sth do/ have sth done 的区别have sth doing have sth to do have sth do have sth done我在网上看了些解释,有些说没有have sth doing/do 有的又说有我都被弄混了到底有没有啊 注意：是s 短语stay in , leave for,upon one's arrival on doing sth 什么意思? prevent 用法能说PREVENT STH FROM DOING STH force sth upon sb 有没有agree sb doing sth这个用法?agree不是不及物吗?为什么还有人说有agree sb doing 或者 agree sb to do 用upon doing造句 come doing sth有人说没有这种用法,可是看欧亨利的小说,裏面写著the art people soon came prowling,hunting如何解释? 的用法就我所知prefer 的结构有prefer doing sth to doing sth;请问能否说prefer doing sth rather than doing sth还是应该说prefer doing sth rather than do sth.可以说prefer sth to sth;能否说prefer sth rather than sthThank you! do sth to do/doing sth这个后面的to do/doing sth都是后置定语吗?区别在哪? when sb doing sth,sb doing sth 这个句型可不可以?这个句型可不可以?如果可以,在什么时候使用?when sb doing sth,sb do sthwhen sb do sth,sb doing sthwhen sb do sth,sb do sth这几个呢? have fun doing sth.是不是可以说have 名词 doing sth.我这样想还因为have time doing sth.如果不对.给我说几个这样的例子 keep on doing 与keep doing 的各自用法是什么为什么有的说keep on doing sth =go on doing sth 继续做···呢? 初中英语问题:such as后面是加doing sth. 还是do sth.?说一下理由. hurry to do sth 和 hurry doing sth 有区别吗 如有请说