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知识与能力： 1. 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. 教学目标 过程与方法： 1. to discuss the differences between the simple past tense and the present perfect tense in groups. 2. to show their results to the class. 情感态度与价值观： To arouse the Ss’ encourage through discussing in groups. 教学重点难点 1.To understand the differences between the simple past tense and the present perfect tense. 2. To understand different uses of the present perfect tense. 教 学 活 动 内 容 活 动 组 织 过 程 改 笔 Step 1 Revision 完成句子。 1. 北京因万里长城而著名。 Beijing _____________ the Great Wall. 2. 这条河是个钓鱼的好地方。 This river is a __________________ fishing. 3.我三天前听说过这件事。 I _____________ this _______________. 4.自从2000年起，他就在上海工作了。 He __________ in Shanghai ______ 2000. Step 2 Presatation Teach the new words. dream vi.& vt. 做梦，梦想 dream about/of 想象；梦想 e.g. Do you often dream at night? 你在夜里经常做梦吗？ I sometimes dream about my parents. 我有时梦见我的父母。 I dream of becoming a teacher. 我一心想当个教师。 Step 3 Grammar explanation Translate some sentences. Daniel 两年前去了北京。 (Daniel went to Beijing two years ago.) Daniel 已经在北京居住两年了。 (Daniel has lived in Beijing for two years.) Tell the students the difference between the simple past tense and the to go over the present perfect tense and translate some sentences. To learn the new words and some expressions. To discuss the difference between the simple past Check out the homework and preview. Do some exercises ,including the two tenses(the simple past tense and the present perfect present perfect tense. Difference: We use simple past tense to tell what happened in the past. We use the present perfect tense to talk about an action that started in the past and continues to the present. Exercises: 1. 三年前他养了只猫做宠物。 He ______ a cat as pet three years ago. 2.这只宠物猫他养了三年了。 He _________ the pet cat for three years. Daniel 上个月买了台新电脑。 Daniel bought a new computer last month. Daniel已经买了台新电脑。 Daniel has bought a new computer. (Daniel has a new computer now.) Differences: 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 happened some time ago. Exercises: 1. 我上个星期去参观了那个新动物园。 I _______ that new zoo last week. 2. 我已经参观过那个新动物园了。 I ______________ that new zoo. 吴老师2010年和2011年访问过加拿大。 Mr Wu visited Canada in 2010 and 2011. 吴老师已经去过加拿大两次。 tense and the present perfect tense in groups. Compare these sentences. tense.). Discuss the differences between the simple past tense and the present perfect tense. Mr Wu has been to Canada twice. Differences: We use the simple past tense to tell what happened in the past. We use the present perfect tense to tell how many times an action has happened till now. Exercises: 1. 我上周看过这部电影。 I _____ this movie last week. 2. 我已经看过这部电影很多次。 I __________ this movie many times. Step 4 Exercises A. Amy is showing Millie some pictures. Complete her sentences with the correct forms of the words in brackets. I_______(visit) the PalaceMuseum with my grandparents the other day. I _________(climb) MountHuang last Summer. ______ you______(try) the famous Tianjin Baozi? I am happy that I ___________(learn) to swim. B. Mr Wu is asking the students to make sentences with the correct 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. 3. I ______(be) in Hainan last week. Some of our classmates _____________ (not be) to Hainan yet. 4. I ___________(live) in SunshineTown since I was born. To know more about the differences between the two tenses. Complete these Exx. To get the Ss to say the differences between the two tense. Daniel ______(live) in Nanjing in 2007. C. Millie has never been to Nanjing. She is asking Simon about the city. Complete their conversation 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? Simon: Oh 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. D. Millie is writing about the USA in her diary. Help her complete her diary entry with the correct forms of the verbs in the box. Saturday, 15 March Have 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. Last week, I (3)_____ a book about the places of interest in the USA. I (4)_________ 20 pages already. It's really interesting. My dad (5)_____ just _________ from the USA, but I (6) ______ never_______ there. I hope I can visit the USA some day. Step 5 Notice 1.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 to discuss what tense to use different time expressions. To get the Ss to learn how to use time expressions.