八年级英语牛津版下册课件：Unit2travellinggrammar(共41张PPT)要素.ppt

* Unit 2 GrammarVerbs with for since  Here are many tasks for you in today’s class. Only when I say “start”, you can stand up to answer questions freely. If your answer is right, you will get some points. If not, you won’t lose any point. The winner will get some prizes. Task 1—3 (1 point each) Task 4 ( 3 points) 竞赛规则： 只有我说“开始”, 才可自由起立抢答 答对，得分；答错，不扣分 eg1: I started to teach English in Hutang Experimental Middle School in 2012. eg2: I left Nanjing in 2011. eg3: I moved to three years ago. eg1: I have worked as a teacher for 4 years. eg2: I have taught English since 4 years ago. eg 3: I have lived in Hutang for 3 years. for+一段时间 since+ 过去的时间 过去时的句子 长动作 短动作 arrive/come/go die buy sleep run read start/begin join listen wait write chat keep fnish/stop borrow leave Short actions, such as start, leave and borrow can not be used with for and since in the present perfect tense. If we want to express a continuous state, we can use another way. 在现在完成时中，短动作，如start, leave and borrow不能和for since连用。如果我们想要表达一个持续性状态，我们需要用另一种方式。 borrow begin/start be on 1. Our class began about 5 minutes ago. 课五分钟前开始。 Our class has been on for 5 minutes/since 5 minutes ago. 课已经开始5分钟了。 finish/stop be over 2. The video finished 4 minutes ago. The video has been over for 4 minutes/since 4 minutes ago. arrive/come/go be in大/at小 3. I arrived at your school an hour ago. I have been at your school for an hour/since an hour ago. leave be away (from) 4. I left Nanjing 5 years ago . I have been away from Nanjing for 5 years/since 5 years ago. keep 5. I borrowed the book 4 weeks ago. I have kept the book for 4 weeks/since 4 weeks ago. borrow begin/start be on 1. Our class began about 5 minute ago. 课五分钟前开始。 Our class has been on for 5 minutes/since 5 minutes ago. 课已经开始5分钟了。 finish/stop be over 2. The vid