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1、The present perfect tense,现在完成时,1.过去某一时间点发生的动作对现在产生影响。,功能：,I have just cleaned my clothes. 我刚洗过衣服。 （“洗衣服”是发生在过去的动作，对现在造成的结果是“衣服干净了”） I have just had my breakfast. (对现在的影响：不饿) 通常与表示包括现在在内的时间副词 just（刚刚）, already（已经）, before, yet（一般疑问：已经；否定句：还） never, ever等状语连用 I have never heard of that before. Have y
2、ou ever ridden a horse? She has already finished the work.,2.过去某一时间点发生的动作持续 到现在或还将持续下去。,I have been here for just over two years. He has worked here since 1989. 从1989年， 通常和 for（段时间）, since（点时间） 引导的时间状语连用.以及 so far, by now, these days, in the last ten years 等连用。 I havent seen her these days. She has
3、learnt English for 3 years/since 3 years ago. They have lived here since 1990.,注意点一： 现在完成时与一般过去时的用法比较 现在完成时表示过去的动作一直延续到现在甚至会继续下去或表示过去的动作对现在造成的影响；一般过去时表示动作发生的时间在过去。现在完成时属于现在时态范围，因此，不能和表示过去的时间状语连用。 如：yesterday, last night, two weeks ago等 试比较： The plane has arrived . 飞机已经来了。（说明现在的情况：飞机在这儿） The plane ar
4、rived a quarter ago. 飞机是一刻中以前来的。（强调动作发生的时间在过去） I have taught here for fifteen years. 我在这儿已经教了十五年。（表示十五年前的动作一直延续到现在，还可能会继续。） I taught here for fifteen years. 我过去在这儿教过十五年。（表示“我“现在已经不在这儿任教了）,The present perfect tense,助动词 （可以帮助构成肯定、疑问和否定句）,注意点三：have been in, have been to 与have gone to 的用法 1、have (has) b
5、een in 表示“在某地（多长时间）”，现在仍在那里。常与表示一段时间的状语连用。例如： Mr. Brown has been in Shanghai for three days. 布朗来上海已经有三天了。 They have been in Canada for five years. 他们到加拿大有五年了。 2、have( has)been to表示“曾经去过某地”，现在已经不在那里了。可与just, ever, never等连用，例如： I have just been to the post office. 我刚才去邮局了。 Mary has never been to the G
6、reat Wall. 玛丽从未去过长城。 Have you ever been to Hangzhou before? 你以前曾经去过杭州吗？ Have (has) been to 后面可接次数，表示去过某地几次。例如： They have been to that village several times. 他们去过那个村庄好几次了。 3、have (has) gone to 意为“到某地去了”，表示到了某地或正在去某地的途中。总之，说话时该人不在现场，例如： -Where is Tom? -He has gone to the bookshop. 他到书店去了。 Jack Johnson
7、 has gone to London. 杰克.约翰逊到伦敦去了。,1.He has cleaned his room. (写一个一般疑问句）,Has he cleaned his room?,2. She has lived in London for four years. (划线部分提问）,How long has she lived in London?,3. He has been to China, _ _? （写出反义疑问句部分）,hasnt he,4. They have come back from work. (写否定句）,They havent come back fro
8、m work.,What are the key words for the Present Perfect Tense?,A: _ your brother _ his homework yet? (finish) B: Yes, he s already done it.,Key words,Has finished,yet,already,注意：already 用于肯定句， yet 用于疑问句和否定句中,A: _ you ever _ to the park? ( be ) B: No, never.,Key words,Have been,yet,already,ever,never,
9、注意： ever 曾经 用于疑问句中 never 从不 带有否定意义,I _ just _ the desk, you can take it to your classroom . (mend ),Key words,have mended,yet,ever,never,just,already,Just 刚刚 与现在完成时连用 一般置句中 Just now 刚才 与一般过去时连用,Tom _ in the factory since he left school ten years ago. (work ),Key words,has worked,yet,ever,never,since
10、,already,since 后面带过去时间或有一般过去时的句子,A: How long _ you _ in this school? (teach ) B: For 6 years.,Key words,have taught,yet,ever,never,since,for,already,+ 一段时间,We _ only _ 100 trees so far. (answer ),Key words,have planted,yet,ever,never,since,for,just,already,so far,到目前为止,Key words,yet,ever,never,since
11、,for,just,before,already,so far,in the past 10 years,twice,也可以是其他表示次数的词,how long,Some verbs cant often be used with “for“ or “since“,Please point out any mistakes and correct,She has bought the computer for two years.,had,Please point out any mistakes and correct,How long have you come to the United
12、 States？,been in,Please point out any mistakes and correct,Ann has gone to China since three months ago.,been in,Please point out any mistakes and correct,My brother has joined the army for five years.,been in,been a soldier,Please point out any mistakes and correct,I have left Shanghai for 3 days.,
13、been away for 3 days.,Please point out any mistakes and correct,I have borrowed the dictionary since 3 days ago .,kept,Please point out any mistakes and correct,The film has begun for 10 minutes.,been on,Please point out any mistakes and correct,The concert has finished for half an hour.,been over,P
14、lease point out any mistakes and correct,His dog has died for two years .,been dead,can you distinguish?,去过某地已经回来 常与ever, never, once,twice,连用,一直留在某地 与for / since连用 用how long 提问,去了某地 还没回来不与 只用于第三人称,Her sister _ Australia, She left this morning.,has gone to,can you distinguish?,去过 常与ever, never, once
15、,twice,连用,在 与时间段连用 用how long 提问,去了 说话时某人不在 只用于第三人称,A: Where is Bob ? B: He _ Japan with his sister.,has gone to,can you distinguish?,去过 常与ever, never, once,twice,连用,在 与时间段连用 用how long 提问,去了 说话时某人不在 只用于第三人称,A: How long _ you _ China? B: I _ here for 3 years.,have been,have been in,can you distinguish?,去过 常与ever, never, once,twice,连用,在 与时间段连用 用how long 提问,去了 说话时某人不在 只用于第三人称,A: _ you ever _ the city ? B: No , never .,Have been to,The past tense or the present perfect tense,know,have known,knew,The pas
