過去完成進(jìn)行時(shí)：
過去完成進(jìn)行時(shí)，就是相對(duì)過去的某個(gè)時(shí)刻來說已經(jīng)對(duì)現(xiàn)在有直接影響并且還在進(jìn)行的動(dòng)作。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)。過去完成進(jìn)行時(shí)是由"had been + 現(xiàn)在分詞"構(gòu)成。
例如：She had been suffering from a bad cold when she took the exam.
她在考試之前一直患重感冒。
過去完成進(jìn)行時(shí)構(gòu)成：
過去完成進(jìn)行時(shí)是由"hadbeen+現(xiàn)在分詞"構(gòu)成。
如：She had been suffering from a bad cold when she took the exam. 她在考試之前一直患重感。
Had they been expecting the news for some time? 他們期待這個(gè)消息有一段時(shí)間了吧？
過去完成進(jìn)行時(shí)用法：
1、表示過去某一時(shí)間之前一直進(jìn)行的動(dòng)作。
過去完成進(jìn)行時(shí)表示動(dòng)作在過去某一時(shí)間之前開始，一直延續(xù)到這一過去時(shí)間。和過去完成時(shí)一樣，過去完成進(jìn)行時(shí)也必須以一過去時(shí)間為前提。過去完成進(jìn)行時(shí)也是一個(gè)相對(duì)的時(shí)態(tài)，上下文中須有明示或暗示的作為參照的過去的時(shí)間。
如：I had been looking for it for days before I found it. 這東西我找了好多天才找著。
如：They had only been waiting for the bus a few minutes when it came. 他們只等了幾分鐘車就來了。
2、表示反復(fù)的動(dòng)作。
如：He had been mentioning your name to me. 他過去多次向我提到過你的名字。
3、過去完成進(jìn)行時(shí)還常用于間接引語(yǔ)中。
如：The doctor asked what he had been eating. 醫(yī)生問他吃了什么。
I asked where they had been staying all those days. 我問他們那些天呆在哪兒。
4、過去完成進(jìn)行時(shí)之后也可接具有"突然"之意的when分句。
如：I had only been reading a few minutes when he came in. 我剛看了幾分鐘他就進(jìn)來了。
She'd only been reviewing her lessons for a short while when her little sister in terrupted her. 她溫習(xí)功課才一會(huì)兒，她妹妹就打斷她了。
過去完成進(jìn)行時(shí)和過去完成時(shí)的比較：
如：She had cleaned the office, so it was very tidy. 她已經(jīng)打掃過辦公室了，所以很整潔。(強(qiáng)調(diào)結(jié)果)
She had been cleaning the office, so we had to wait outside. 她一直在打掃辦公室，所以我們不得不在外面等著。(強(qiáng)調(diào)動(dòng)作一直在進(jìn)行)