《Language in use》Seeing the doctor PPT下载

外研版八年级英语下册《Language in use》Seeing the doctor PPT下载，共46页。

学习目标

能够正确使用现在完成时与for和since引导的时间状语从句连用的结构。

能够针对不健康的生活习惯给出恰当的建议。

能够关心自己及他人健康。

Warm up

How long have you had your bike?

I have had my bike since two years ago.

How long have you studied English?

I have studied English for two and a half years.

Language practice

1. I haven ’t done much exercise since I got my computer last year.

2. I have had him for three months now.

3. Since then, it has become part of my life.

Grammar

现在完成时（三）

当表示动作已经完成并对现在有一定影响时，我们一般用现在完成时。同时，可分别 用just, already或yet加以强调或说明。

其结构也是：have / has +动词的过去分词.

常用的时间状语有:

already/just 一般置于have/has 之后，用于肯定句中；

在否定句中则要用yet 表示“还，未”。

for 和 since 在现在完成时中的应用

for与since都能与现在完成时连用，但区别较大：

（1）for后须接“时间段”

He has studied English for five years.

他学英语5年了。

（2）since后须接“时间点”

He has studied English since 1999.

他从1999年开始学英语。

（3）二者可以转换

for + 一段时间 = since + 一段时间 + ago

He has been here for five weeks.

= He has been here since five weeks ago.

他到这儿已经有五个星期了。

（4）since能引导时间状语从句(主句用现在完成时，从句用一般过去时)，而for则不能。

He has taught here since he came to China.

自从他来到中国就在这儿教书。

We have been friends since we met in school.

我们从在学校见面起就成为了好朋友。

（5）现在完成时常用句型：

①It is (has been) +时间段+ since +时间状语或从句

It is four days since last Friday.

从上周五到现在已经四天了。

It has been two years since Jim came to Beijing.

吉姆来北京已经两年了。

②This is the first (second…) time that + 从句

句型中的that从句通常使用现在完成时。

This is the first time that Jenny and Danny have been to China.

这是珍妮和丹妮第一次来屮国。

This is the third time that I have seen Karen.

这是我第三次见到Karen。

（6）均须与延续性动词连用，也可以与非延续性动词的否定式连用。

I have bought this computer since four years ago. (×)

I have had this computer since four years ago. (√)

I haven ’t bought anything for two months.(√ )

I haven't heard from him for 3 weeks. (√)

Around the world

The World Health Organization

1. When was the World Health Organization set up?

It was set up in 1948.

2. What is the work of World Health Organization?

It helps ordinary people all over the world. It cures, prevents and controls serious diseases, and educates people about how to protect their health.

Language points

1. I do not know how to stop and become fitter and healthier.

①句中的“how to...”作know的宾语，是“疑问词＋动词不定式”结构，此结构常用于tell、show、know等词的后面作宾语。

②fit作形容词，意为“适宜的，合适的”。常用短语：be fit for... 适合……

【拓展】fit作动词，意为“适合”。

它指大小、形状上合适，引申为吻合、协调。

She is fit for the job. 她适合这份工作。

The shoes don ’t fit me. 这鞋不合脚。

2. How about asking a friend to go running with you？

How about...？相当于 What about...？

①用于征求对方的意见和看法。

例：How/What about that book？那本书怎么样？

②询问天气或身体状况。

例：How/What about your grandpa？你爷爷的身体如何？

How/What about the weather in London？伦敦的天气如何？

3. Why not turn off the computer and TV and join a sports club？

① Why not do sth.?相当于 How/ What about doing sth.？

② turn off 关闭。

【拓展】与turn相关的短语还有：

turn down调低(音量)，拒绝；turn on (把水源、煤气、电源等) 打开；

turn in交上，归还；turn up出现，发生；turn round转身，转向；

turn out生产，结果是。