基本的理論區(qū)別：

現(xiàn)在完成時(shí)強(qiáng)調(diào)目前/現(xiàn)在的結(jié)果

過(guò)去完成時(shí)強(qiáng)調(diào)過(guò)去某動(dòng)作之前的動(dòng)作

請(qǐng)看例子吧：

A.

現(xiàn)在完成時(shí)的結(jié)構(gòu)：has/have been done，

到目前為止，已被……了

現(xiàn)在完成時(shí)的功用與表意： / ，說(shuō)明/如：

has been finished ，

1.My homework so I can go out to play.(目前/現(xiàn)在的結(jié)果是：我可以給你看做完了的作業(yè)，或 I go out to play)

haven' t been seen

2. The party will begin，but the students here.(目前的結(jié)果是：現(xiàn)場(chǎng)還沒(méi)有見到學(xué)生)

has been learned

3. Because Lesson 3 ，let's do some exercises on it.(目前/現(xiàn)在的結(jié)果是：我們知道，了解并理解了相關(guān)知識(shí)，可以做練習(xí)了)

(以上例句有點(diǎn)別扭哈)

B.

過(guò)去完成時(shí)的結(jié)構(gòu)：had been done

在過(guò)去某個(gè)動(dòng)作之前，被……了

過(guò)去完成時(shí)的功用與表意是：，如：

had been finished，

1.After my homework I out to play.(finish在過(guò)去的動(dòng)作 went out 之前發(fā)生，所以，had been finished)

had been beaten

2.The boy ，before I there.(beat 在過(guò)去的動(dòng)作 went there 之前發(fā)生，所以，had been beaten)

ed

3.When I arriv ，my room . And it was so tidy.(clean 在過(guò)去的動(dòng)作 arrived 之前，所以就 had been cleaned)

ed

4. Then I realiz my wallet in my room.(leave 在過(guò)去的動(dòng)作 realized 之前發(fā)生，所以就 had been left)

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