过去完成时

它们是用作现在完成时和过去完成时的助动词。

They are used as auxiliaries to the present and past perfect tenses .

目标语言形式为过去完成时。

The target linguistic form was past perfect tense .

WTO已是过去完成时中国入世建筑设计市场管理政策朝花夕拾

Policy of the Architectural Design Management Since China Joined the WTO

Andrew一喝完咖啡就走了。（过去完成时）

Andrew left as soon as he had drunk his coffee .

本句两分句由连词but连接，hadheard为过去完成时，表示在家人问玛雅医生之前就发生了此动作。Ihavegivenjustafewhoursbefore做定语修饰thesimpleinstructions，省略连接词that。

All of them had heard the simple instructions I have given just a few hours before , but they have three or four different versions .

（过去完成时）他们说生产成本已经下降了。

They said that production costs had been reduced .

我一到剧场，节目就开始了。（从句用过去完成时，主句用过去时）

No sooner had I arrived at the theatre than the performance began .

用过去完成时表示过去要做的事。我宁愿她现在就着手做这项工作。

Eg. I 'd rather she set out to do the work now .

同时也有过去完成时。

Callum : And also the past perfect .

从句为过去完成时。

I found that they had left here .

我以为你的秘书把它们寄了。对不起。（过去完成时）

I thought they had been posted by your secretary . I 'm sorry .

我希望/但愿+过去完成时

I wish / If only + Past perfect

爱因斯坦到十四岁时就自学完了高等数学。（从句为一般过去时，主句要用过去完成时）

By the time he was fourteen , Einstein had learned advanced mathematics all by himself .

埃里克几天前死了，这些年来，埃里克都是过着隐士生活。（过去完成时）

Eric died a few days ago and these years , he had lived as a recluse .

为什么我们用过去完成时，来表示过去的事情？

Why do we use " had been warned " to describe an event happened in the past ?

这个学期，我们学到了过去时，现在完成时，过去完成时和将来时等。

And will learn The simple past tense , The present perfect tense , The past perfect tense as well as The future tense .

其中，一般过去时和现在完成时和过去完成时的误用和混用比率相对较高。

Among these tenses errors , simple past tense , present perfect and past perfect tense have a relative high error and mistaken use frequency .

过去完成时在语篇中的应用有两种构形：靶域构形和源/靶域构形，根据语境分别突显结果状态和事件过程。

Past perfect tense falls into two types of configurations in discourse : target-configuration and source / target configuration , respectively profiling resultant state and event process in accordance with context .

2当一句话中有两个在过去不同时段发生的动作时，先发生的动作使用过去完成时，而后发生的动作则常用一般过去时。

The action that happens second is often in the past simple tense . In this example : I arrived . When you want to talk about two past actions , one which happened before the other , remember to use the past perfect for the first action , and the past simple for the second .