八年级下Unit9

1、 unit 9 have you ever been to an amusement park?can you translate these sentences?we have run out of room to store snow globes.whats the best gift you have ever received?i have ever received the best gift is a watch.现在完成时：结构：have / has +过去分词用法： 现在完成时表示过去发生的动作对现在 造成的影响或结果，强调的是现在的情况。现在完成时表示从过去一直持续到现在的

2、动作和状态，常于for ,since 等引导的时间状语连用。现在完成时： 现在完成时表示过去发生的动作对现在造成的影响或结果，强调的是现在的情况，常与already, yet, ever, never, before 等连用。i have already seen the film. （“看电影”是过去发生的动作，对现在的影响是“我已经了解电影的内容”）we have ever heard of mickey mouse.我们都曾经听说过米老鼠。（“听说”是过去发生的动作，现在的结果是“我们都已知道米老鼠这个卡通人物”）我已经看过这部电影。现在完成时表示从过去一直持续到现在的动作和状态，常于f

3、or ,since, these days, all this year 等时间状语连用。he has worked in the bank since 1990 i have studied with three friends for two hours此时，句中的谓语动词通常是延续性动词，像 live, be , work, study, wait, teach等。过去分词的构成：动词的过去分词分为规则变化和不规则变化。规则动词在词尾加-ed,其规则和动词过去式相同。不规则动词要单独记忆。go原形 -过去式 过去分词wentgoneseesawseenhearheardheardgive

4、gavegivenbe was/werebeentaketooktaken原形 -过去式 过去分词saysaidsaidrunranruncome camecomeknowknewknownloselostlostreadreadread现在完成时的肯定式、否定式和疑问式。i have received a special gift.i have not received a special gift.have you received a special gift?yes ,i have. / no, i havent.he has ever lived in another place.h

5、e has not ever lived in another place.has he ever lived in another place?yes, he has. / no, he hasnt.have/ has been to 和 have / has gone to have/ has been to “指去过某地”have / has gone to “已经去了某地”我去过美国。i have been to america.他已经去了美国。he has gone to america.exercise:1. i _ (know) her since 1996.2. he _ ne

6、ver _ (be) to nanjing.3. she _ (be) ill since two weeks ago.4. the film _ already _ (start) for two minutes.5. we _ (read) that book for several times.6. i _ (lost) my key to my door. i cant open it.7. she _ (not have) breakfast yet. she is hungry.8. _ you _ (find) your wallet? 9. how long _ you _ (

7、teach) at this school?10._ your father _(work) in the factory since1999?have knownhasbeenhas beenhasstartedhave readhave losthasnt hadhave foundhavetaughthasworked时态综合练习：1. there _ (be) a meeting next saturday.2. they _ (clean) the classroom every day. they _ (clean) their classroom now.3. how many

8、english words _ mary _ (learn) since last year?4. you _ (be) late for class if you _ (not hurry).5. the children _ the supper when the lights went out.6. _ you often _ (write) to her? no, i _ never _ (write)to her since i _ (leave).7. what _ mike _ (do) at nine yesterday evening? will becleanare cle

9、aninghaslearnedwill bedont hurrywere havingdo writehavewrittenleftwasdoing现在完成时和一般过去时 现在完成时表示过去发生的动作对现在的影响或结果，强调的是现在的情况，不能和表示过去的时间状语yesterday, last week, five days ago等连用。 一般过去时只表示过去的动作或状态，和现在不发生联系。只能和表示过去的时间状语连用。他已经从上海回来了。他一个月前从上海回来的。he has already come back from shanghai.he came back from shanghai one month ago.现在完成时和现在完成进行时现在完成时和现在完成进行时中的“指动作或状态从过去某时开始持续到现在，可能持续也可能刚刚结束”这一用法相仿,