A:must have killed對(duì)過去的肯定推測,意思是：你一定會(huì)沒命的“must+have+done”表示對(duì)過去事情的肯定推測,譯成“一定做過某事”,該結(jié)構(gòu)只用于肯定句.B.would have killed意思是：本來會(huì)沒命的.would+have+done”虛...那would have done跟should have done 有什么區(qū)別啊“should+have+done”意思是“本來應(yīng)該做某事，而實(shí)際沒做?！?“shouldn't+have+done”表示本來不應(yīng)該做某事，而實(shí)際做了。含有指責(zé)對(duì)方或自責(zé)的含意。 “would+have+done”虛擬語氣，表示對(duì)過去事情的假設(shè)，意思是“本來會(huì)做”。應(yīng)該和會(huì)兩個(gè)詞的詞義還是有所區(qū)別的，你自己細(xì)細(xì)體會(huì)一下吧！