完成时(现在 过去 将来)

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1、the Present Perfect Tense现在完成时现在完成时现在完成时的构成：现在完成时的构成：have / has +动词过去分词动词过去分词时间状语：时间状语：already， yet， ever， never， just， before规则动词的过去分词：规则动词的过去分词：1）一般加）一般加+ ed: worked, started2) “辅音辅音+y”结尾的动词，结尾的动词，y 变成变成i后加后加ed:study-studied3)以以“e”结尾的动词后加结尾的动词后加 “d”: hope-hoped4)双写双写 辅音字母：辅音字母：stopped动词过去分词形成方式：动词

2、过去分词形成方式：规则和不规则变化规则和不规则变化动词的过去式以及过去分词不规则动词的过去式与过去分词不规则动词的过去式与过去分词:AAA: put put put letlet letABB: standstood stoodABA:becomebecamebecomeABC: eat ateeaten现在完成时的不同的形式：肯定式：主语肯定式：主语+has/have+过去分词（过去分词（p.p.）+. My sister has already washed all the clothes.否定式：主语否定式：主语+hasnt+（p.p.）+.My sister hasnt already

3、 washed all the clothes. 疑问式：疑问式：Has/have+主语主语+p.p.+?Has your sister already washed all the clothes? 肯定答语：肯定答语：Yes, 主语主语+hasYes, she has.否定答语：否定答语：No， 主语主语+hasntNo, she hasnt. He has lost his key. The key isnt in his pockets now.用法用法1They are in the room now.They have come into the room.past now Yes

4、terday , we cleaned the classroom.Now , the classroom is clean because we have cleaned it.用法用法1强调强调过去发生的动作过去发生的动作对对现在产生的现在产生的结果或影结果或影响响 1. My father bought many books for me yesterday . Now , I have a lot to read because _2. I saw this film last week. Now, I know this film because I_.3. I finished m

5、y homework yesterday. Now, I can give it to the teacher because I_my father has bought many books for me.have seen it before have finished it. “仍然，还仍然，还 ” 用在疑问句和否定用在疑问句和否定句中。句中。I havent read this book yet .Have you had breakfast yet ?already:Yet: “已经已经”通常用于肯定句中。通常用于肯定句中。 I have already posted the le

6、tter.有时，也用在疑问句中表示惊讶。有时，也用在疑问句中表示惊讶。 Have you eaten up all the food already ?“从来不从来不” 用在否定句中。用在否定句中。Is he famous ?I have never heard of him .evernever“曾经曾经”通常用于疑问句和通常用于疑问句和肯定句中。肯定句中。 I have ever seen this film.Have you ever been to the USA ?“以前以前”用在完成时中，用在完成时中，放在句尾。放在句尾。have never read this kind of b

7、ooks before.justbefore“刚刚刚刚 ”用在陈述句中。用在陈述句中。 Ihave just bought a novel。She began to work in 1999.She still works here now. She has worked at this school for 2 years. 用法用法2：now past I began to teach English at this school fiveyears ago.I have taught English at this school four five years.用法用法2 2：过去发生的

8、动作一直过去发生的动作一直延续延续到现在。到现在。 1. I am a doctor. I began to work when I was 22.Now , I am 26. I _ for four years.2. We went to the USA last Monday. Today is Monday . We _ (stay) in the USA since last Monday. have workedhave stayedsince and forThe woman has worked at this school for 2 years.( since two ye

9、ars ago)since 2 years agosince 1998;since she came to the school)for + for + 一段时间一段时间since+since+点时间点时间一、用一、用for和和since填空。填空。_three hours_three oclock_two days_yesterday afternoon_I came here_last Sunday_a week_a long time_1997 _two weeks_three years ago _ last monthforsinceforsincesincesinceforfors

10、inceforsincesince 1.Theyve known each other since_. A.1995 B. three years 2.Ive been interested in Chinese for_. A. last year B. one year 3. She has been a doctor for_. A. two years B.two years ago 4. Ive had a headache since_. A. I got up this morning B. five hours 5. Weve been here for_. A. one ho

11、ur B. one oclock AABAB6. My parents have owned this house for_. A. a long time B. many years ago7. Theyve been in love since_. A. last spring B. three months8. We have known each other since_. A. one year B. last year9. -How long have you been like this? -Since_. A.last night B. two days10.-How long