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基本的理论区别： 现在完成时强调目前/现在的结果 过去完成时强调过去某动作之前的动作 请看例子吧： A. 现在完成时的结构：has/have been done， 到目前为止，已被……了 现在完成时的功用与表意： / ，说明/如： has been finished ， 1.My homework so I can go out to play.(目前/现在的结果是：我可以给你看做完了的作业，或 I go out to play) haven' t been seen 2. The party will begin，but the students here.(目前的结果是：现场还没有见到学生) has been learned 3. Because Lesson 3 ，let's do some exercises on it.(目前/现在的结果是：我们知道，了解并理解了相关知识，可以做练习了) (以上例句有点别扭哈) B. 过去完成时的结构：had been done 在过去某个动作之前，被……了 过去完成时的功用与表意是：，如： had been finished， 1.After my homework I out to play.(finish在过去的动作 went out 之前发生，所以，had been finished) had been beaten 2.The boy ，before I there.(beat 在过去的动作 went there 之前发生，所以，had been beaten) ed 3.When I arriv ，my room . And it was so tidy.(clean 在过去的动作 arrived 之前，所以就 had been cleaned) ed 4. Then I realiz my wallet in my room.(leave 在过去的动作 realized 之前发生，所以就 had been left) (责任编辑：admin) |