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课件网) 【版本：新人教 册别：选择性必修三】 Discovering Useful Structures UNIT 4 ADVERSITY AND COURAGE 1. Enable the Ss to master the usage of the Present Perfect Continuous tense 2. Enable the Ss to use the relevant grammar flexibly and authentically in the real situation Teaching Objectives Ⅰ Lead-in Lead-in This is the adventure that I have been dreaming of. (diary 1, Para. 1) We are now camped on the rice and we have been managing to survive, but spring is coming, and the ice will soon begin to melt. (diary 2, Para. 3) We have been struggling for days, but things on Elephant Island are going from bad to worse. (diary 3, Para. 1) Look at the sentences below and think what is the tense of each sentence. (P38-39) present perfect continuous tense (现在完成进行时) Structure and definition have/has been doing the Present Perfect Continuous Tense 现在完成进行时 have/has + p.p be+doing 现在完成进行时表示动作从过去某一时间开始，一直持续到现在,或者刚刚终止，或者可能还要继续进行下去。 Question: what is the function of the present perfect continuous tense 1. to talk about action that started in the past and stopped recently. There is usually a result now. 2. to talk about action that started in the past and is continuing now. This is often used with for or since. 单元语法自我探究 Look at the sentence in the present perfect continuous tense and discuss the function of the tense Functions 表示动作从过去某时开始一直到说话时还在进行或可能还要继续下去。 表示在一段持续的时间内动作的多次重复，而这个重复的动作在说话时并不一定在进行。 P38 ...this is the adventure that I have been dreaming of. P38 We are now camped on the ice and we have been managing to survive. P39 We have been struggling for days, but... 表示某种强烈的感彩,如：赞赏、批评、愤怒、失望等。 Lead-in 基本结构：“have / has been + 现在分词” 基本含义：表示动作从过去某一时间开始一直持续到现在，可能刚刚停止，也可能仍在继续。 Present Past Future present perfect continuous tense (现在完成进行时) Ⅱ Observe and Discover Observe and Discover The usage of the tense (1) The artist has been painting the picture for 3 hours, but he has not finished it yet. You have been designing solar racing cars for a long time. 这位艺术家画这幅画已经三个小时了，但他还没有画完。 你设计太阳能赛车已经很长时间了。 现在完成进行时态表示动作还未结束，还要继续持续下去。 Translate the sentences into Chinese. Observe and Discover The usage of the tense (2) 1. All these days he has been writing articles to our magazine. 2. He has been promising to help you. Hasn’t he done it 3. I _____ (take) part in races for about four years. 4. Jack _____ (phone) Jane every night for the last week. have been taking has been phoning 表示动作并不是一直不停地进行，而是在断断续续地重复。 Observe and Discover 1. Tom has always been working hard. 2. Time has been flying so quickly! 3. What have you been doing to my dictionary 带有感彩，使语言表达更加生动。 赞许的感彩 感叹时间之快 不满的感彩 What ... ...
