Tounderstandthedifferencesbetweenthesimplepast.pptVIP

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. 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。 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.) 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。 Mr Wu has been to Canada twice. 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. Finish off the exercises in workbook. 现在完成时的时间状语：for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always等，皆不确定的时间状语。 共同的时间状语：this morning, tonight, this April, now, already, recently, lately 等。 3) 现在完成时可表示持续到现在的动作或状态，动词一般是延续性的，如：live, teach, learn, work, study, know。 　一般过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等。 句子中如有过去时的时间副词（如yesterday, last week, in 1960）时，不能使用现在完成时，要用过去时。 （错）Tom has written a letter to his parents last night. （对）Tom wrote a letter to his parents last night.? 1. Mother ____ me a new coat yesterday. I _______ it on. It fits me well. A. had made … have tried B. made … have tried C. has made … tried D. made … tried B 2. We _______ trees last Sunday. So far we _______ over 3,000 trees there. A. planted； planted B. planted； have planted C. have planted； planted D. have planted；