had been doing這是過(guò)去完成進(jìn)行時(shí);表示從過(guò)去的某一個(gè)時(shí)間點(diǎn)開(kāi)始做某事一直持續(xù)到過(guò)去的某個(gè)時(shí)間點(diǎn)并且仍在進(jìn)行。放在間接引語(yǔ)或虛擬語(yǔ)氣中時(shí)它的時(shí)態(tài)不能再向前推，向后推是現(xiàn)在完成進(jìn)行時(shí)。

雙語(yǔ)例句

1、Benjamin was forced to admit what he had been doing.

本杰明被迫承認(rèn)他所做的一切。

2、I had told people what he had been doing, so now the police were onto him.

我已將他的所作所為告訴了別人，因此現(xiàn)在警方正在追查他。

3、Until this summer, China had been doing that carefully.

截止今年夏天，中國(guó)一直在審慎地這么做。

4、I had been doing the work for two hours when the teacher came.

老師來(lái)時(shí)那件工作我已做了兩小時(shí)了。&當(dāng)時(shí)工作尚未完成，所以老師來(lái)了我還繼續(xù)在做。

5、Everybody knew what he had been doing all those years.

had been doing 和had been done的差別

1、首先要區(qū)分has been done與 had been done的區(qū)別：

have/has been done 是現(xiàn)在完成時(shí)的被動(dòng)語(yǔ)態(tài)。表示某事被做，。

如：The problems have been solved.這些問(wèn)題已經(jīng)被解決了。

had been done 則是過(guò)去的過(guò)去，是過(guò)去完成的被動(dòng)態(tài)時(shí)。(當(dāng)你想說(shuō)發(fā)生在過(guò)去的兩件事時(shí)，就要分清誰(shuí)先誰(shuí)后。先發(fā)生的用過(guò)去完成時(shí)，后發(fā)生的要用過(guò)去時(shí))。

如：The rooms had been cleaned when I came. 我來(lái)的時(shí)候，房間已經(jīng)被打掃了。

2、區(qū)分has/have been doing與 had been doing

has/have been doing是現(xiàn)在完成進(jìn)行時(shí)，并對(duì)現(xiàn)在有影響。

如句子：I have been dreaming all the night.

had been doing是過(guò)去完成進(jìn)行時(shí)，也是過(guò)去的過(guò)去，需要時(shí)間先后順序的對(duì)比.

如：I had been doing the cleaning before my mother arrived at home.