Module 4 Unit 3 课件 2022-2023学年外研版英语八年级下册

初中英语外研版八年级下 Module 4 Seeing the doctor Unit 3 Language in use 1. To summarise and consolidate the use of the present perfect tense together with since and for. 2. To go over the present perfect tense. 3. To be able to understand learning materials on health. 4. To be able to carry out a survey to find the most suitable exercise for you. 学习目标 I haven’t done much exercise since I got my computer last year. I have had him for three months now. Since then, it has become part of my life. Language practice 含义 1.表示动作或状态从过去某时开始,一直延续至今,可能刚刚结束,也可能继续下去。通常用since或for引导的时间状语连用,对其提问常用how long提问,谓语动词用延续性动词。 语法讲解 现在完成时 语法讲解 现在完成时 (1)since用作连词时引导的是时间状语从句,从句中用一般过去时,主句用现在完成时态;since用作介词时,引导的是时间状语,since后跟时间点。 —How long have you lived here? ——你在这里住了多久了? —I have lived here for about ten years. ——我在这里住了大约10年了。 We have been very busy since the new term began. 新学期开始以来,我们一直很忙。 I have lived here since January. 自一月份以来,我一直住在这里。 语法讲解 现在完成时 (2)for后跟一段时间,for本身不表示什么意义,只是用来表示时间段。若动作或状态持续到现在(即包含现在在内),for引导的时间状语用于现在完成时。 We have learned English for four years. 我们学英语已经四年了。 She has been in the army for two years. 她参军已经两年了。 语法讲解 现在完成时 2.终止性动词和延续性动词 (1)英语中有些动词,如come, go, begin, start, die, buy, borrow, sell等这些动词不能延续,被称为终止性动词,不能与表示一段时间的状语连用。 语法讲解 现在完成时 (2)将终止性动词转化为“be+形容词或副词”。 语法讲解 现在完成时 (3)有的终止性动词可以转化为意思相同的延续性动词。 语法讲解 现在完成时 Sam got sick two days ago. Sam has been sick for two days. Practice Compare these sentences. Sherry got her driver’s license (执照) in 1999. Sherry has had her driver’s license since(自从) 1999. Arnold started to play tennis in January. Arnold has played tennis since January. Maggie moved to Hawaii in 2016. Maggie has lived in Hawaii for about 3 years. — How long have you had your bike? — I have had it for about two years. 1 How long have you studied at this school? 2 How long have you studied English? 3 How long have you known your best friend? 4 How long have you lived in this place? 5 How long have you used this book? 1 Work in pairs. Ask and answer the questions.