1、外研选择性必修第一册 Unit 6 Period 2Grammar 学习目标学习目标12To know the usage of present perfect continuous tenseTo use present perfect continuous tense correctly 目标一目标一:To know the usage of present perfect continuous tenseActivity 1:Look at the sentences from the reading passage and answer the questions.a Wild ani
2、mals such as these Tibetan antelopes have now been using these passages for years.b.before I know it,we have reached Tanggula Station.1 Which of these statements are true about sentence(a)?(1)Wild animals started using these passages in the past.(2)Wild animals used these passages only once.(3)Wild
3、animals still use these passages now.2 What is the difference between the expressions in bold in sentences(a)and(b)?They are different in form and meaning.For sentence(a)the form is“have been doing”,while for sentence(b)the form is“have done”.In meaning,the bold part in sentence(a)means the action i
4、s continuous from the past;while the bold part in sentence(b)means the action happened once in the past.Now look for more sentences with the present perfect continuous tense in the reading passage,and summarise their uses in your own words.1 All this time,the song“Sky Railway”has been playing inside
5、 my head.2 Wild animals such as these Tibetan antelopes have now been using these passengers for years.3 The journey has been flying by,.4 The Qing-Tibet Plateau has been attracting peoples admiration for centuries.Activity 2:Read the sentences below.Find out the common thing below and summarise the
6、 structure.1.I have been reading the book.2.I have been living here since 1988.3.I have been waiting for two hours.4.She is very tired.She has been working all morning.Summary:所有画线部分都是由_构成的，都属于_。have/has+been+doing现在完成进行时【语法精析】（1）表示动作从过去某时开始，一直延续到现在，将来还可能延续下去，强调动作的延续性。I have been waiting for an hour
7、,but she hasnt come yet.Tom has been working hard since the new term began.（2）表示从过去某时开始到现在这一段时间内动作一再重复发生She has been phoning Jim every night for the past two weeks.You have been telling me not to be late all the way.（3）表示动作刚刚结束，该动作一般不再继续，有时会指出结果。I have been playing ping-pong all morning,so Im sweati
8、ng.Ive been painting the door,so my hands are very dirty.（4）表示某种感情色彩。You have been daydreaming but never make an effort.You have been lying to me.【注意】【注意】1 现在完成时和现在完成进行时的区别1）在不用时间状语的情况下，现在完成进行时的动作不一定已经完成，很可能持续下去，而现在完成时一般表示动作已经完成。即现在完成进行时强调动作的延续性，而现在完成时强调动作的结果。例如：a.Ive been designing solar racing car
9、s.（我一直在设计太阳能赛车。）b.Ive designed five or six different cars.（我已经设计五六辆小汽车了。）2）现在完成进行时往往表示动作在重复，而现在完成时一般不表示动作的重复。例如：a.Ive been taking part in races for four years.（我这四年一直在参加比赛。）b.How many races have you taken part in?（你参加多少场比赛了？）3）现在完成进行时与所有进行时态一样带有感情色彩。可使表达显得生动，而现在完成时往往只表明一个事实、一种影响或结果，不带感情色彩。例如：What ha
10、ve you been doing?You look fed up.（你一直在干什么呀？你看上去很不高兴。）2常与现在完成进行时连用的时间状语现在完成进行时常与表示一段时间的状语连用，例如：all the time，this week，all night，these few days，for.，since.等。例如:a.A private detective has been tailing him for several weeks.（一位私人侦探几个星期以来一直在跟踪他。）b.Craig loves outdoor activities-he skis in winter and has
11、been fishing and hunting since he was a child.（Craig热爱户外活动，冬天他去滑雪，他从小就开始钓鱼和打猎。）目标二目标二:To use present perfect continuous tense correctly Activity 1:Complete the passage with the correct form of the verb in brackets.I 1 _(hear)a strange sound for a while.Its a deep,loud roar,like a lions.But there are
12、nt any lions here.Or are there?Soon I see what 2 _(make)the noise:a howler monkey.Now I feel less worried.Realising that something 3_(move)on my shoulder,I turn my head to look at it.have been hearinghas been makingis movingOh no!Its a giant spider!I brush it off and it runs under some leaves.I try
13、to bat away the huge insects,which 4 _(fly)around my head in a black cloud for quite a while.I pull off the headset and Im back in my living room.Thank goodness!I 5 _(give)the latest virtual reality headset and,for the last twenty minutes,I 6 _(use)it to explore the Amazon.This is an amazing experie
14、nce and a reminder of how many species there are in the rain forest.We must do all we can to protect it.have been flyinghave been givenhave been usingActivity 2:Look at the charts and make sentences using the present perfect continuous tense.1 The number of trees has been increasing in the last 20 y
15、ears.2 Desert areas have been reducing in the last 20 years.3 Butterfly population has been increasing/has been becoming larger and larger in the last 20 years.Activity 3:Work in pairs.Talk about how the environment where you live has changed.Use the present perfect continuous tense where appropriate.The businessmen have been trying to run more and more factories since the new policy came out.The number of tress has been increasing.学习总结学习总结1 Can you retell the usage of present perfect continuous tense?2 Can you make some sentences with present perfect continuous tense?
