英语选择性必修 第一册Unit 6 Nurturing nature备课课件ppt

这是一份英语选择性必修 第一册Unit 6 Nurturing nature备课课件ppt，共28页。PPT课件主要包含了观察归纳，现在完成进行时等内容，欢迎下载使用。

Unit 6 Nurturing nature
Present perfect cntinuus
T learn the use f present perfect cntinuus tense T use the present perfect cntinuus tense t talk abut hw the envirnment where yu live has changed
Lk at the sentences frm the reading passage and answer the questins.
a Wild animals such as these Tibetan antelpes have nw been using these passages tr years.b …befre I knw it, we have reached Tanggula Statin.
1 Which f these statements is true abut sentence(a)? (1) Wild animals started using these passages in the past. (2) Wild animals used these passages nly nce. (3) Wild animals still use these passages nw.
a Wild animals such as these Tibetan antelpes have nw been using these passages tr years.
2 What is the difference between the expressins in red in sentences (a) and (b)?
a: have been usingb: have reached
a: have been ding – present perfect cntinuus b: have dne – present perfect
Nw lk fr mre sentences with the present perfect cntinuus tense in the reading passage, and summarise its use in yur wn wrds.
1 The train has been racing alng steadily since it left Xining.2 All this time the sng “Sky Railway” has been playing inside my head. 3 Wild animals such as these Tibetan antelpes have nw been using these passages fr years.4 The Qinghai-Tibet Plateau has been attracting peple’s admiratin fr centuries. 5 Nw, thanks t ur effrts, passengers frm all ver the cuntry have been enjying these magical landscapes.
Pay attentin t the expressin in red and underlined.
1 The train has been racing alng steadily since it left Xining.2 All this time the sng “Sky Railway” has been playing inside my head. 3 Wild animals such as these Tibetan antelpes have nw been using these passages fr years.
4 The Qinghai-Tibet Plateau has been attracting peple’s admiratin fr centuries. 5 Nw, thanks t ur effrts, passengers frm all ver the cuntry have been enjying these magical landscapes.
现在完成时常与all this time, nw等时间状语以及由since或fr引导的时间状语连用。
1. 未完结性。现在完成时表示动作已完成, 而现在完成进行时则常常具有未完成含义。2. 短暂性。现在完成时与现在完成进行时都可表示延续至今的状态, 但是现在完成进行时常常表示短暂性。如： They have lived in New Yrk. （长期性） They have been living in New Yrk.（短暂性）
现在完成进行时与现在完成时的区别
3. 连续性或重复性。现在完成进行时常常用于表示延续至今的连续性或重复性动作。如： I’ve been kncking. I dn’t think anybdy’s in.
【语境应用】选用括号内合适的内容完成下面对话。Mlly: Mum, yu lk really tired. What 1. _____________________ (are yu ding, have yu been ding) all day?Mum: I 2. _____________________ (am cleaning, have been cleaning) the huse.Mlly: 3. ___________________ (Have yu seen, Have yu been seeing) a gld necklace?
have yu been ding
have been cleaning
Have yu seen
Mum: N, I have cleaned all the rms but haven't seen it. Hw lng 4. _______________________ (were yu lking fr, have yu been lking fr) it?Mlly: Well, I 5. _____________________ (didn't see, haven't seen) it since last week.Mum: Amanda has tidied up a lt tday. 6. ________________ (Have yu asked, Have yu been asking) her yet?Mlly: N, I'll ask her nw. Thanks, Mum.
have yu been lking fr
haven't seen
Have yu asked
Cmplete the passage with the crrect frm f the verbs in brackets.
I 1________________ (hear) a strange sund fr a while. It’s a deep, lud rar, like a lin’s. But there aren’t any lins here... Or are there? Sn I see what 2_________________ (make) the nise: a hwler mnkey. Nw I feel less wrried. Realising that smething 3_______________ (mve) n my shulder, I turn my head t lk at it. Oh n! It's a giant spider! I brush it ff and it runs under sme leaves. I try t bat away the huge insects, which 4_______________ (fly) arund my head in a black clud fr quite a while.
have been hearing
has been making
have been flying
I pull ff the headset and I’m back in my living rm. Thank gdness! I 5_______________ (give) the latest virtual reality headset and, fr the last twenty minutes, I 6________________ (use) it t explre the Amazn. This is an amazing experience and a reminder f hw many species there are in the rain frest. We must d all we can t prtect it.
have been given
have been using
Lk at the charts and make sentences using the present perfect cntinuus tense.
1. The number f trees has been increasing in the last 20 years.2. Desert areas have been reducing in the last 20 years.3. Butterfly ppulatin has been increasing/has becming larger and larger in the last 20 years.
Wrk in pairs. Talk abut hw the envirnment where yu live has changed. Use the present perfect cntinuus tense where apprpriate.
Air pllutin and water pllutin have always been existing in ur city. Hwever, with the effrt that we have been making t change the serius envirnment situatin fr recent 20 years. At the same time, peple’s awareness f prtecting envirnment has been imprving. The envirnment f my city changed a lt.
Write a passage t intrduce hw the envirnment where yu live has changed. Use the present perfect cntinuus tense in yur passage.