现在完成时态复习教案

1、现在完成时态复习教案教学目的1.To go over the knowledge in unit 1教学重点和难点1.present perfect tense and some words and expressions教学过程一、重点单词：just,since,fact,turn,miss,pleasant,land,way,lonely,lucky,grandpa,unkind,impolite,over,unhealthy二、短语使用：in fact,get married,turn into,noise pollution,take off,in some ways,from tim

2、e to time,be in service/use,free time,on ones own,on longer,the changes to；三、重点结构：It is easy for him to see them as often as before.It was built to the north of Lantau Island.I wish you ahappy holiday.It no longer provides agood environment for wildlife.The changes have brought many benefits but the

3、y have also caused many problems for wildlife.四、语法：现在完成时，present perfect tense 1、现在完成时所表示的动作发生在过去，但考虑较多的不是动作发生在过去的什么时候，而是强调与当前的联系，即过去与现在的关系，。强调过去的动作对当前造成的影响和后果，或强调动作本身或状态持续地现在，所以属于现在时范畴。它的主要用法可概括为八个字：影响、结果、持续和经历。2、现在完成时的构成：肯定式：I/We/you/they have+been/worked she/he/it has+been/worked否定式：have not+been

4、/worked has not+been/worked疑问式：Have+主语+been/worked?Has+主语+been/worked?3、现在完成时的用法(1)表示过去发生的某一动作对现在生成的影响或结果。如：He has read the book.他已经读过这本书了。读书是发生在过去的动作，对现在造成的结果是读过了。(2)表示动作过去已经开始，持续到现在，可能还要继续下去。这时往往与表示一段时间的状语连用。如：He has worked for more than three years.他工作三年多了，I have been in Suzhou for ten years.我来苏州

5、已经十年了。(3)现在完成时属于现在时态范畴，不能和表示过去的时间状语连用，如yesterday,last week,a day ago等。但能够和never,ever,already,yet,just(刚刚),for,since,in the past three years,so far(到当前为止),by now,before(以前)等连用。如：Have you finished your picture yet?你已经完成你的画了吗?I have never heard of him before.过去我从未听说过他。(4)瞬间动词也叫短暂性动词。这种动词动作开始也就意味着结束，所以不

6、能与表示一段时间的状语连用。这些动词是become,begin,start,buy,borrow,arrive,come,die,fall,finish,go,join,leave,marry等。这了表述这种意思，我们常用相对应的延续性动词have,keep等或短语be+名词/形容词/位置副词/介词短语来代替短暂性动词。如：He has kept the book for three weeks.这本书他已借了三周了。The meeting has been on for half an hour.会已开始半小时了。He has been in the army for three years

7、.他参军三年了。(5)其他词组的区别since和for的区别since短语或从句表示过去的动作延续至今，since之后为时间点。如：He has lived here since 2000.2000年以来他一直住在这儿。I havent seen him since ten years ago.自十年前开始我就没见过他。I have known him since Iwas very young.我很小时就理解他了。For短语表示动作延续多长时间，for后面跟时间段。如：He has lived here for three years.他住这儿已经三年了。I havent seen her for along time.我已经好久没见到她了。have/has been in,have/has been to和have/has gone to的区别have/has been in表示在某地呆了多久了，能够与表示一段时间的状语连用。Have/has been to表示曾到过某地(已回来)，不能与一段时间的状语连用。两者表示的意义不同，所以跟的时间状语也不同。如：He has been to Guangzhou twice.他去过广州两次。He has been in Guangzhou for along time.他在广州已呆了很长时间了。have/has gone t