1、Unit 3Unit 3 Online toursGrammar1. To understand the differences between the simple past tense and the present perfect tense.2. To grasp the expressions with the present perfect tense.3. To grasp the expressions with the simple past tense.4. To understand different uses of the present perfect tense.

2、Learning targets 完成句子。1. 北京因萬(wàn)里長(zhǎng)城而著名。 Beijing _ the Great Wall.2. 這條河是個(gè)釣魚的好地方。 This river is a _ fishing.3. 我三天前聽說過這件事。 I _ this _.4.自從2000年起，他就在上海工作了。 He _ in Shanghai _ 2000.is famous forgood place to goheard of three days agohas worked sincedream vi.& vt. 做夢(mèng)，夢(mèng)想dream about/of 想象；夢(mèng)想e.g. Do you often

3、 dream at night? 你在夜里經(jīng)常做夢(mèng)嗎？ I sometimes dream about my parents. 我有時(shí)夢(mèng)見我的父母。 I dream of becoming a teacher. 我一心想當(dāng)個(gè)教師。New wordspassport n. 護(hù)照Daniel 兩年前去了北京。Daniel went to Beijing two years ago.Daniel 已經(jīng)在北京居住兩年了。Daniel has lived in Beijing for two years.We use simple past tense to tell what happened in

4、the past.We use the present perfect tense to talk about an action that started in the past and continues to the present.Presentation1. 三年前他養(yǎng)了只貓做寵物。 He _ a cat as pet three years ago.2. 這只寵物貓他養(yǎng)了三年了。 He _ the pet cat for three years.kepthas keptExercisesDaniel 上個(gè)月買了臺(tái)新電腦。Daniel bought a new computer la

5、st month.Daniel已經(jīng)買了臺(tái)新電腦。Daniel has bought a new computer.(Daniel has a new computer now.)We use the simple past tense to tell what happened in the past.We use the present perfect tense to talk about the result of an action.When the action happened is not very important. It may have just happened or

6、happened some time ago.Presentation1. 我上個(gè)星期去參觀了那個(gè)新動(dòng)物園。 I _ that new zoo last week.2. 我已經(jīng)參觀過那個(gè)新動(dòng)物園了。 I _ that new zoo.visitedhave visitedExercises吳老師2010年和2011年訪問過加拿大。Mr Wu visited Canada in 2010 and 2011.吳老師已經(jīng)去過加拿大兩次。Mr Wu has been to Canada twice.We use the simple past tense to tell what happened i

7、n the past.We use the present perfect tense to tell how many times an action has happened till now.Presentation1. 我上周看過這部電影。 I _ this movie last week.2. 我已經(jīng)看過這部電影很多次。 I _ this movie many times.sawhave seenExercisesSimon is showing Millie some pictures. Complete his sentences with the correct forms o

8、f the words in brackets.I _ (visit) the Palace Museum with my grandparents the other day.I _ (climb) Mount Huang last Summer.visitedclimbed_ you ever _ (try) the famous Tianjin Baozi?I am happy that I _(learn) to swim. Have tried have learntMr Wu is asking the students to make sentences with the cor

9、rect tenses. Help them complete the sentences with the correct forms of the words in brackets.1. I _ (finish/ just) my homework. Millie _ (finish) her homework 20 minutes ago.2. I _ (write) an email to my friend yesterday. Daniel _ (write/ already) two emails.has already writtenhave just finishedwro

10、tefinished3. I _(be) in Hainan last week. Some of our classmates _ (not be) to Hainan yet.4. I _ (live) in Sunshine Town since I was born. Daniel _ (live) in Nanjing in 2007.waslivedhave livedhaven not beenMillie has never been to Nanjing. She is asking Simon about the city. Complete their conversat

11、ion with the correct forms of the words in brackets.Millie: _ (you/be/ever) to Nanjing?Simon: Yes. I(2)_(be) there three times.Millie: When (3)_ (you/go) there last?Simon: Last summer. I (4)_(spend) a week there.Millie: (5)_ (you/like) it?Have you ever beenhave beendid you gospentDo you likeSimon: O

12、h yes. I (6)_ (have) a great time there. I (7)_ (visit) many places of interest and (8)_ (eat) lots of local food.Millie: Lucky you! I (9)_ (be/never) there.hadvisitedatehave never beenMillie is writing about the USA in her diary. Complete her diary entry with the correct forms of the verbs in the b

13、ox.be buy read return see showSaturday, 15 MarchHave you ever dreamt of travelling around the world without a passport? Yes, you can realize your dream by taking an online tour. Yesterday Danniel (1)_ me an online tour of the USA. I (2)_ never _ so many wonderful pictrues before.showedhave seenLast

14、week, I (3)_ a book about the places of interest in the USA. I (4)_ 20 pages already. Its really interesting. My dad (5)_ just _ from the USA, but I (6) _ never_ there. I hope I can visit the USA some day.be buy read return see showhave beenboughthave readhasreturnedWe often use these time expressio

15、ns with the simple past tense: yesterday/ the day before yesterday the other day just now/in the past last. .ago in（過去的年份）We often use these time expressions with the present perfect tense:already up to now ever until/till now just so far recently (not) yet since for in the past years Tips:some day

16、和 the other day 的區(qū)別：some day指將來“總有一天、有朝一日、終將、(日后)某一天”，謂語(yǔ)動(dòng)詞用一般將來時(shí)。如: Your wishes will come true some day.總有一天你的愿望會(huì)實(shí)現(xiàn)的。 Some day youll have to pay for what you have done. 總有一天你要為你的行為而付出代價(jià)的。 Tips:some day 和 the other day 的區(qū)別：the other day 相當(dāng)于a few days ago, 意為“幾天前、某天、那天、不久前”，句中用一般過去時(shí)。如： I met her in th

17、e street the other day.幾天前我在街上碰見過她。 I bought the watch the other day.這手表我是幾天前買的。 1) 一般過去時(shí)表示過去某時(shí)發(fā)生的動(dòng)作或單純敘述過去的事情，強(qiáng)調(diào)動(dòng)作；現(xiàn)在完成時(shí)為過去發(fā)生的，強(qiáng)調(diào)過去的事情對(duì)現(xiàn)在的影響，強(qiáng)調(diào)的是影響。Summary2) 一般過去時(shí)常與具體的時(shí)間狀語(yǔ)連用，而現(xiàn)在完成時(shí)通常與模糊的時(shí)間狀語(yǔ)連用，或無時(shí)間狀語(yǔ)。 一般過去時(shí)的時(shí)間狀語(yǔ)：yesterday, last week, ago, in 1980, in October, just, now等，皆為具體的時(shí)間狀語(yǔ)。現(xiàn)在完成時(shí)的時(shí)間狀語(yǔ)：for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always等，皆不確定的時(shí)間狀語(yǔ)。共同的時(shí)間狀語(yǔ)：this morning, tonight, this April, now, already, recently, lately 等。3) 現(xiàn)在完成時(shí)可表示持續(xù)到現(xiàn)在的動(dòng)作或狀態(tài)，動(dòng)詞一般是延續(xù)性的，如：live, teach, learn, work, study, know。一般過