山东省茌平县博平镇中学九年级英语《完成时态的用法》课件_人教新目标版.ppt

完成时态的用法 * 1）现在完成时态表示 过去发生的动作对现在造成的影响或结果 。 Our teacher has left . We have studied English . I have already finished the homework . He has had his lunch . He has become a doctor . Have / has + 过去分词 1. 构成 2. 意义 * 2）某个动作从过去已经开始， 一直持续到现在, 还有可能持续到将来，动作的 持续性要通过一段时间来表示。 一段时间的表达方法有 两 种: For : + 一段时间 for a year for two weeks for three years Since ：过去的某一时刻, since nine since last week 一般过去时态的时间状语从句, since you came. since you got home. * ! :for 和since 所引导的时间状语都表示一段时间. 对划线部分提问都用 How long . 1） He has been away since last week . 2）He has been away for one week . 对下列划线部分进行提问。 练一练 ： * 结束性动词不能和表示一段时间的时间状语连用,但是他可以转换成相应的延续性动词. 1. 直接用 延续性动词 buy – catch(get) a cold – borrow — Come/go /become — put on — 2. 转换成 be+名词 join the army – Join the Party – go to school – Have have a cold keep be wear be a soldier be a Party member be a student * 3. 转换成 be + 形容词或副词 die — finish – begin — leave — be away fall sleep – be asleep close – be closed 4. 转换成 be + 介词短语 go to school – be in school join the army – be in the army be dead be over be on * 1.我们买这本书三年了. We have had the book for three years . 2.他感冒三天了. He has had a cold for three days. We bought the book three years ago . He caught a cold three days ago. 一般过去时态和现在完成时态可以构成 同意句 * 3.自从上星期我借的这本书 I have kept the book since last week. 4.我成为一个学生两年多了. I have been a student for over two years. I borrowed the book last week. I became a student two years ago. 5.Mr Black死了三年了。 Mr Black has been dead for three years. Mr Black died three years ago. * 6.小名参军半年了。 Xiao Ming has been a soldier for half a year. Xiao Ming joined the army half a year ago. 7.我们上了8年学了。 We have been students for eight years. 8.下课10分钟了。 The class has been over for ten minutes. 9.电影开始了一小时了。 The film has been on for an