一、我們來(lái)分析過(guò)去將來(lái)完成時(shí)時(shí)態(tài)，可以看出，過(guò)去將來(lái)完成時(shí)有3種時(shí)態(tài)，第一個(gè)是表過(guò)去的動(dòng)作，第二個(gè)表將來(lái)，第三個(gè)表完成，而過(guò)去將來(lái)有可表示為would/should do sth，完成時(shí)表示為have done，因此過(guò)去將來(lái)完成時(shí)就可表示為：would/should have done.例如：
He told me he would have finished it by the end of the next month.
他告訴我他下個(gè)月結(jié)束時(shí)他將完成它。

二、過(guò)去將來(lái)完成時(shí)的被動(dòng)語(yǔ)態(tài)結(jié)構(gòu)：should have been done , would have been done.例如：
1.I believed by the end of that year an advanced version of that software would have been developed, but I was wrong.
我堅(jiān)信到那年年底為止，那個(gè)軟件的新版本將被開(kāi)發(fā)出來(lái)。但是我錯(cuò)了。
2.He said that the garden shed would have been being cleaned for two hours by nine o’clock.
他說(shuō)到九點(diǎn)為止花園的小棚子將已經(jīng)被打掃了兩個(gè)小時(shí)了。
3.It would have been completed before 8 o'clock.
它將會(huì)在八點(diǎn)之前被完成。
4.He said?his?work would have been finished by?him?the next day.
他說(shuō)明天他將會(huì)完成他的工作。