Learning about Language优质课一等奖

现在完成时

The present perfect time Get to know and review

1. Over time I have been changed quite a lot. 2. First as a PC (personal computer) and then a laptop, I have been used

in offices and homes since 1970s. 3. As I have grown older I have also grown smaller. 4. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told. 5. Since the 1970s many new applications have been found for me. I have become very important in communication, finance and trade. I have also been put into robots and used to make mobile phones as well as help with medical operations. I have even been put into space rockets and sent to explore the Moon and Mars.

Read and find 1. Over time I have been changed quite a lot. 2. First as a PC (personal computer) and then a laptop, I have been used in offices and homes since 1970s. 3. As I have grown older I have also grown smaller. 4. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told. 5. Since the 1970s many new applications have been found for me. I have become very important in communication, finance and trade. I have also been put into robots and used to make mobile phones as well as help with medical operations. I have even been put into space rockets and sent to explore the Moon and Mars.

Present 现在完成时

has/have done

has/have been done 概念（什么时候用？）

1. 一个动作开始于过去，持续到现在（也许还将持续下去）。

I have learnt English for 16 years. Great change have taken place in my hometown in the past few years. 这种表示从过去延续到现在并包括现在在内的一段时间状语有：

for+一段时间，lately, recently, in the last/past few years, since then, up to now, so far. 2. 一件发生在过去的事情对现在产生的影响，注意这时说话者说话的中心在过去的事情

对现在产生的影响。

常用的状语有：already, just, yet, never, before等

-- Are you going to furthur your studies after

graduation? -- Well, I haven't decided yet. I might make sone other choices. Now that we have lost all the money, it;s no use turning on me and saying it's all my fault. 3. 根据上下文句意

When you are home, give me a call to let me know you have arrived safely. Every year a flood of farmers arrive in Shenzhen for the money-making jobs they have been promised before leaving their hometowns.

4. 还有英语中的某些固定句型中（这种最简单，根本不用考虑，刷脸卡咯）

This/ It is the first/ second ... tine + that 从句，从句谓语要用现在完成时。

This is the first time that we have seen a film in the cinema together as a family.

More you should pay attention to

1. 注意主动语态和被动语态

Up to now, the program __________________ (save) thousands of children who would otherwise have died. In the last few years thousands of films __________________ (produce) all over the world. 2. 正确认识过去完成时

We arrived at work in the morning and found that somebody had broken into the office during the night.

Practice 1. His first novel ____________________ (receive) good reviews since it came out last month. 2. Moyan's novels ___________________ (translate) into at least 20 different films over the past years. 3. Great changes _____________________ (take place) in my hometown in the past ten years. 4. How many times ___________________ (tell) not to be late again！

5. Computers ____________________ (use) in every aspect of our daily life! 6. The boy who stole the bowl ____________________ (sentence) yet.