现在完成进行时的定义的应用5种用法 
1. 现在完成进行时的定义
    现在完成进行时表示某动作从过去某个时间开始，一直延续到现在，并且还有可能持续下去。
We have been waiting for him for two hours. 我们已经等了他两个小时了。
2. 现在完成进行时的结构
    have/has been + doing
3. 现在完成进行时的应用
    现在完成进行时所用的时间状语：this month/week/year, these days, recently/lately, in the past few+时间段, since +时间点，for+时间段。
They have been building the bridge for two months. 这座桥他们已经建了两个月了。
They have been planting trees this month. 这个月他们在植树。
4. 现在完成进行时的用法
1) 表示动作的延续
The Chinese have been making paper for two thousand years.

中国有2,000年的造纸历史。（动作还将继续下去）

新概念英语mp3下载
新概念英语听力资源
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I have been learning English since three years ago. 
自从三年前以来我一直在学英语。
2) 表示在说话时刻之前刚刚结束的动作。
We  have  been waiting for you for half an hour.
我们已经等你半个钟头了。（动作不再继续下去）
3) 有些现在完成进行时的句子等同于现在完成时的句子。
They have been living in this city for ten years./They have lived in this city for ten years.
他们在这个城市已经住了10年了。
I have been working here for five years./I have worked here for five years.
我在这里已经工作两年了。
4) 大多数现在完成进行时的句子不等同于现在完成时的句子。
I have been writing a book.（动作还将继续下去）
我一直在写一本书。
I have written a book.（动作已经完成）
我已经写了一本书。
They have been building a bridge.
他们一直在造一座桥。
They have built a bridge.
他们造了一座桥。
5) 表示状态的动词不能用于现在完成进行时。
I have known him for years.
我认识他已经好几年了。
I have been knowing...（×）
这类不能用于现在完成进行时的动词还有：love（爱），like（喜欢），hate（讨厌）等。

1.So it was a great honour to be invited backstage at the not­for­profit Panda Base, where ticket money helps pay for research. I ________(allow) to get up close to these cute animals at the 600­acre centre.
2.Truly elegant chopsticks might ________(make) of gold and silver with Chinese characters.
3.Then, after two and a half years, the mother ________(drive) the young panda away.
4.While online shopping ________(change) our life, not all of its effects have been positive.
5.Jack ________(work) in the lab when the power cut occurred.
6.When walking down the street, I came across David, whom I ________(see) for years.
7.It was raining lightly when I ________(arrive) in Yangshuo just before dawn. But I didn't care.
8.This cycle ________(go) day after day: The walls warm up during the day and cool off during the night and thus always a timely offset(抵消) for the outside temperatures.
9.To my delight, I________(choose) from hundreds of applicants to attend the opening ceremony.
10.As you go through this book, you ______(find) that each of the millions of people who lived through World War Ⅱ had a different experience.

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