外研版八年級英語下冊《Language in use》Seeing the doctor PPT下載，共46頁。
學習目標
能夠正確使用現在完成時與for和since引導的時間狀語從句連用的結構。
能夠針對不健康的生活習慣給出恰當的建議。
能夠關心自己及他人健康。
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
現在完成時（三）
當表示動作已經完成并對現在有一定影響時，我們一般用現在完成時。同時，可分別 用just, already或yet加以強調或說明。
其結構也是：have / has +動詞的過去分詞.
常用的時間狀語有:
already/just 一般置于have/has 之后，用于肯定句中；
在否定句中則要用yet 表示“還，未”。
for 和 since 在現在完成時中的應用
for與since都能與現在完成時連用，但區別較大：
（1）for后須接“時間段”
He has studied English for five years.
他學英語5年了。
（2）since后須接“時間點”
He has studied English since 1999.
他從1999年開始學英語。
（3）二者可以轉換
for + 一段時間 = since + 一段時間 + ago
He has been here for five weeks.
= He has been here since five weeks ago.
他到這兒已經有五個星期了。
（4）since能引導時間狀語從句(主句用現在完成時，從句用一般過去時)，而for則不能。
He has taught here since he came to China.
自從他來到中國就在這兒教書。
We have been friends since we met in school.
我們從在學校見面起就成為了好朋友。
（5）現在完成時常用句型：
①It is (has been) +時間段+ since +時間狀語或從句
It is four days since last Friday.
從上周五到現在已經四天了。
It has been two years since Jim came to Beijing.
吉姆來北京已經兩年了。
②This is the first (second…) time that + 從句
句型中的that從句通常使用現在完成時。
This is the first time that Jenny and Danny have been to China.
這是珍妮和丹妮第一次來屮國。
This is the third time that I have seen Karen.
這是我第三次見到Karen。
（6）均須與延續性動詞連用，也可以與非延續性動詞的否定式連用。
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的賓語，是“疑問詞＋動詞不定式”結構，此結構常用于tell、show、know等詞的后面作賓語。
②fit作形容詞，意為“適宜的，合適的”。常用短語：be fit for... 適合……
【拓展】fit作動詞，意為“適合”。
它指大小、形狀上合適，引申為吻合、協調。
She is fit for the job. 她適合這份工作。
The shoes don’t fit me. 這鞋不合腳。
2. How about asking a friend to go running with you？
How about...？相當于 What about...？
①用于征求對方的意見和看法。
例：How/What about that book？那本書怎么樣？
②詢問天氣或身體狀況。
例：How/What about your grandpa？你爺爺的身體如何？
How/What about the weather in London？倫敦的天氣如何？
3. Why not turn off the computer and TV and join a sports club？
① Why not do sth.?相當于 How/ What about doing sth.？
② turn off 關閉。
【拓展】與turn相關的短語還有：
turn down調低(音量)，拒絕；turn on (把水源、煤氣、電源等) 打開；
turn in交上，歸還；turn up出現，發生；turn round轉身，轉向；
turn out生產，結果是。
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關鍵詞：Language in use PPT課件免費下載，Seeing the doctor PPT下載，.PPTX格式；
