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课件网) SB1U6 Grammar Present perfect continuous Look at the sentences from the reading passage and answer the questions. (P53) Q1. Which of these statements is true about sentence (a) (1) Wild animals started using these passages in the past. (2) Wild animals used these passages only once. (3) Wild animals still use these passages now. a. Wild animals such as these Tibetan antelopes have now been using these passages for years. b. ... before I know it, we have reached Tanggula Station. Q2. 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 is continuous from the past; while the bold part in sentence (b) means the action happened once in the past. a. Wild animals such as these Tibetan antelopes have now been using these passages for years. b. ... before I know it, we have reached Tanggula Station. Learning objectives 一、构成 I have been reading the book. I have been living here since 1988. I have been waiting for two hours. She is very tired. She has been working all morning. We have all along been making mistakes like this. have/has＋been＋v ing 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。 二、用法 表示动作从过去开始，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, but she hasn't come yet. 我都等了一个小时了，但是她还没来。 Tom has been working hard since the new term began. 自从新学期开始，汤姆一直在努力学习。 2. 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 I'm sweating. 整个上午我一直在打乒乓球，所以我浑身是汗。 I've been painting the door, so my hands are very dirty. 我一直在给门刷油漆，所以我的手很脏。 3. 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. 两星期以来，她每天晚上都给吉姆打电话。 You have been telling me not to be late all the way.一路上你一直在告诉我不要迟到。 表示某种感彩。 You have been daydreaming but never make an effort. 你一直在做白日梦，但从不努力。(指责) You have been lying to me. 你一直在对我说谎。(气愤) 三、不能用现在完成进行时的情况 有些动词不能用于现在完成进行时，但可用于现在完成时，这些动词为： 感官：see, hear, feel, sound, seem 情感：like, love, hate, want, wish 存在：exist, stay, remain 拥有或从属：have, possess, own, consist, belong 思维：think, believe, understand, know I have known him for years. 我认识他已经好几年了。 They have finished the work. 他们已经完成了这份工作。 四、现在完成进行时与现在完成时的区别 现在完成时强调的是某个刚刚完成的动作或某个过去的动作对现在的影响或产生的结果；现在完成进行时则强调动作的延续性。试比较： I have thought it over. 我已经考虑过这件事了。 I have been thinking ... ...
