過去將來時(shí)：

　　表示從過去的某一時(shí)間來看將來要發(fā)生的動(dòng)作或存在的狀態(tài)。過去將來時(shí)常用于賓語從句和間接引語中。

　　去將來時(shí)的出發(fā)點(diǎn)是過去，即從過去某一時(shí)刻看以后要發(fā)生的動(dòng)作或狀態(tài)。

　　過去將來時(shí)表達(dá)法：

　　1. would+動(dòng)詞原形

　　例如：When you asked Li Lei for help, he would never refuse you.

　　2. was/were going to+動(dòng)詞原形

　　例如：He told ustaht he was going to attend the meeting.

　　3. was/were to+動(dòng)詞原形

　　例如：Li Lei was to arrive soon.

　　4. was/were about to+動(dòng)詞原形

　　例如：We were about to leave there when it began to rain heavily and suddenly.

　　5. was/were+現(xiàn)在分詞

　　例如：He was leaving the next day.

　　句型結(jié)構(gòu)：

　　肯定句：主語+be（was，were）going to+動(dòng)詞原形～.

　　否定句：主語+be（was，were）not going to+動(dòng)詞原形～.

　　疑問句：Be（Was，Were）+主語+going to+動(dòng)詞原形～？

　　肯定句：主語+would（should）+動(dòng)詞原形～.

　　否定句：主語+would（should）not+動(dòng)詞原形～.

　　疑問句：Would（Should）+主語+動(dòng)詞原形～？

　　過去將來時(shí)的構(gòu)成和一般將來時(shí)一樣，只不過把助動(dòng)詞be變?yōu)檫^去式，把will，shall變?yōu)檫^去式。

　　例句：I didn''t know if he would come. =I didn''t know if he was going to come. 我不知道他是否會(huì)來。

　　過去將來時(shí)具體用法：

　　一、would+不定式

　　1.用“would+不定式”表示過去將來時(shí)間通常帶有表示過去將來的時(shí)間狀語，而且多見于從屬分句。

　　He said he would come back the next day.

　　2.如果要表示在過去將來某一時(shí)間正在進(jìn)行得動(dòng)作，可用“would+不定式進(jìn)行體”。

　　例如：He never imagined that some day he would be living away from his motherland.

　　這種“would+不定式進(jìn)行體”結(jié)構(gòu)也可能僅僅表示一般過去過去將來時(shí)間，如同“will/shall+不定式進(jìn)行體”表示一般將來時(shí)間一樣。、

　　例如：He told me that Mary would be coming the next day.

　　如果要表示在過去將來某時(shí)以前業(yè)已發(fā)生得事態(tài)，可用“would+不定式完成體”。

　　例如：The delegation would have arrived by four o'clock that afternoon.

　　如果要表示從過去某時(shí)開始一直延續(xù)到過去將來某時(shí)得動(dòng)作或事態(tài)，可用“would+不定式完成進(jìn)行體”。

　　例如： She said that by the end of May she would have been studying medicine for three years

　　二、was/were going to +不定式

　　用做表示過去將來，也通常帶有表示過去將來時(shí)間得狀語。

　　例如： He said that he was going to live in the country when he retired.

　　用做表示的動(dòng)作或事態(tài)，也可以是沒有實(shí)現(xiàn)的意圖。

　　例如：Last  Sunday we were going to go for a picnic but it rained .

　　三、was/were to +不定式

　　用做表示過去將來，通常指按過去的計(jì)劃安排將在某個(gè)過去將來時(shí)間發(fā)生得事態(tài)。

　　例如：They  were not to get away with it if they continued to violate the law.

　　用作表示過去將來的安排，如果這個(gè)安排后來被取消了，沒有實(shí)現(xiàn)，則用“was/were to +不定式完成體”表示，并可與表示現(xiàn)在、過去或?qū)淼脮r(shí)間狀語連用。 此外，其也可用作于表示以后不可避免得要發(fā)生得事件。

　　例如：They said goodbye,little knowing they were never to meet again.

　　四、was/were about to +不定式

　　用半助動(dòng)詞be about to 的過去時(shí)形式也可使其表示過去將來。這種結(jié)構(gòu)通常指最近的過去將來事態(tài)，而且在一定語境中通常指未曾實(shí)現(xiàn)的意圖：

　　例如：We were about to start when it began to rain .

　　五、某些動(dòng)詞的過去進(jìn)行時(shí)可表示過去將來時(shí)

　　come,go,leave,arrive,start等嚴(yán)格按照時(shí)間表發(fā)生的表起止的動(dòng)詞可用過去進(jìn)行時(shí)代替過去將來時(shí)。

　　例1：He said the train was leaving at six the next morning.他說火車第二天早晨出發(fā)。

　　例2：She told me she was coming to see me.她告訴我她要來看我。

　　六、特定場合的一般過去時(shí)可表示過去將來時(shí)

　　條件狀語從句和時(shí)間狀語從句中須用一般過去時(shí)代替過去將來時(shí)。

　　例1：I didn't know when she would come, but when she came I would let you know.我不知道她什么時(shí)候來，但她來了我會(huì)告訴你。

　　析：第一個(gè)when引導(dǎo)賓語從句，可使用將來時(shí)，第二個(gè)when引導(dǎo)時(shí)間狀語從句，只能用一般過去時(shí)代替過去將來時(shí)。

　　例2：I didn't know if she would come,but if she came I would let you know.我不知道她是否來，但如果她來我會(huì)告訴你。

　　析：第一個(gè)if引導(dǎo)賓語從句，可使用將來時(shí)，第二個(gè)if引導(dǎo)條件狀語從句，只能用一般過去時(shí)代替過去將來時(shí)。