牛津译林版英语8B Unit1 grammar课件.ppt

8B Unit 1 Past and Present Grammar English Teaching-group of Grade Eight ;Learning aims:;一、现在完成时的含义;1.I have been at this school _______ more than two years. 2. She has worked in the factory _______ ten years ago. 3. Mr. Green has lived in the city ________ he was born. 4. His father has been a party member ______ twenty years.;（2）现在完成时表示过去发生或已经完成的某一动作对现在造成的影响或结果。(汉语中常用“已经”、“过”、“了”等表达) 通常与表示包括现在在内的时间副词just(句中）, already(句中，句末）, before(句末）, yet（句末）, never（句中）, ever（句中）,recently(句末)等状语连用。例如：;1.Eddie has just eaten my food. (Eddie刚已经吃了我的食物。） 2.I have never heard of that before.（我以前从未听说过那件事） 3. Have you ever ridden a horse?（你曾经骑过马吗？） 4.She has already finished the work. （她早已经完成这个工作了。） 5.We haven’t finished our homework yet. (我们还没有完成作业呢。);二、现在完成时与一般过去时的区别;2）一般过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语连用，或无时间状语，不能与表示过去的时间连用。 ◎ 一般过去时的时间状语有：yesterday, last week，…ago, in1980, in October, just now等具体的时间状语。　 ◎ 现在完成时的时间状语有：for, since, ever, never, just, already, yet, in the past/last few years等不确定的时间状语。;Let’s try! I’m sure you can do it well!;4.Mr. Li _______(begin) to work in this factory in 1990. He ___________ (work) in the factory for 20 years.;三、现在完成时的构成;（2）否定句;(3)一般疑问句及回答;e.g. _______you __________the film?(watch) Yes, I _______. _______your father ________the film?(watch) No, he _______.;(4)特殊疑问句;四、 过去分词的构成;(B) 不规则动词的过去分词;;stop mop trap plan;写出下列动词的过去式和过去分词:;1 borrow 2 hope 3 make 4 get 5 plan 6 cry;already: 肯定句，表示已经发生 ever: 疑问句，表示“曾经” for: 肯定句/疑问句/否定句，表示一段时间 just: 肯定句，表示“刚刚” never: 否定句，表示“从不” recently: 肯定句/否定句/疑问句，表示“最近” since: 肯定句/否定句/疑问句, 表示“自以后” yet: 疑问句/否定句, 表示“已经”或者“还没有” ;1. 副词already和yet。already一般用于肯定句中，yet一般用于否定句和 疑问句中。 如: We have already finished our homework. 我们已完成作业了。; - I have never been to the Great Wall. 我从未去过长城。;;;Have a try;5. Have you _______ ridden a horse? ( ever, for, yet) 6. They have _____ arrived. (ever, just, yet) 7. He has _______ washed the dishes . ( already, ever) 8. We have not comple