8Bunit1Grammar.ppt

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1、8 B Unit 1 Past and present8 B Unit 1 Past and presentGrammar Present perfect tense一、现在完成时的定义一、现在完成时的定义(1)表示动作发生在过去，延续到现在。(2)表示过去发生的某一动作对现在造成的影响或产生的结果.have/has + 过去分词二、现在完成时的构成二、现在完成时的构成（1 1）肯定句：）肯定句：I/We/You/They + have + p.p(过去分词）过去分词）+其它。其它。He/She/It + has + p.p(过去分词）过去分词）+其它。其它。1.他们已经完成家庭作业了。The

2、y _ their homework. (finish）2.他已经完成家庭作业了。He _his homework. （finish)have finishedhas finished（2 2）否定句）否定句I/We/You/They+have not / havent +p.p(过去分词）过去分词）+其它。其它。 He/She/It +has not / hasnt +p.p(过去分词）过去分词）+其它。其它。They _ their homework yet (还未）还未）. (finish）He _ his homework yet. （finish)havent finishedhas

3、nt finished(3)(3)一般疑问句及回答一般疑问句及回答-Have+I/you/we/they+p.p(过去分词）过去分词）+其它？其它？-Yes, I/you/we/they have. -No, I/you/we/they havent.-Has +she/he/it+p.p(过去分词）过去分词） +其它？其它？-Yes, she/he/it has.-No, she/he/it hasnt.你找到你的钢笔了吗？没有。 - Have you found your pen? - No, I havent.他已经搬到南京了吗？是的。 - Has he moved to Nanjing

4、? - Yes, he has.(4)(4)特殊疑问句特殊疑问句特殊疑问词特殊疑问词+have/has+have/has+主语主语+p.p+p.p+ +其它其它？1.The girl has learned English for 6 years. 2.I have eaten two apples for breakfast. How long has the girl learned English?What have you eaten for breakfast? 三、过去分词的构成三、过去分词的构成 A 规则动词规则动词 finish-finished change-changedc

5、arry-carriedcry-criedstop- stoppedfit-fittedplan-planned +ed一般动词一般动词 +d以以“ e ”结尾的动结尾的动词词 -y+ied以以“辅音字母辅音字母 + y ”结尾动词结尾动词 双写该辅音双写该辅音字母字母 +ed重读闭音节结重读闭音节结尾，末尾只有尾，末尾只有一个辅音字母一个辅音字母(B) (B) 不规则动词的过去分词不规则动词的过去分词原形过去分词原形过去分词dodoneeateatengogonefindfoundseeseenforgetforgottenbuyboughtcomecomeputputcutcutbuild

6、builtwritewritten(Page122)过去分词的构成过去分词的构成原形原形过去分词过去分词 原形原形过去分词过去分词travelvisitmovestopstayfinishownshoplearnsolvetravelledmovedstayedownedlearnedvisitedstoppedfinishedshoppedsolvedA 规则动词的过去分词规则动词的过去分词B 不规则动词的过去分词不规则动词的过去分词原形原形过去分词过去分词 原形原形过去分词过去分词thinkputcatchcostgivegrowmakehurtwriterunthoughtcaughtg

7、ivenmadewrittenputcostgrownhurtrun原形原形过去分词过去分词原形原形过去分词过去分词feelbringfallwearflysinghaveforgetdrinkkeepfeltfallenflownhaddrunkbroughtwornsungforgottenkept完成下面的练习(1)He _(not finish) the homework yet. (2) My family _ (live) in Nanjing since 1996.(3) They _ already _ (decide) to go to Kunming for the hol

8、iday. (4) The girl _ (learn) English for about two years. (5) _ Tom _ (write) letters to you recently?hasnt finishedhave livedhave decidedhas learnedHas writtenLets try!Lets try!1.She has already cleaned the kitchen. (改为改为否定句否定句)She_cleaned the kitchen _.2. They have visited some interesting places

9、in China. (改为一般疑问句改为一般疑问句)_ _ they _ _ interesting places in China?3. The poor dog has died.(改为一般疑问句并作否改为一般疑问句并作否定回答）定回答）-_the poor dog _? -No, it _.hasnt yetHave visited anyHas died hasnt Lets try!Lets try!4. They have borrowed ten books from the library. (对划线部分提问对划线部分提问)_ _books _ they _ from the

10、library?5. I have ever been to the Great Wall. (改为改为否定句否定句)I _ _ been to the Great Wall. How many have borrowedhave never四、与现在完成时连用的时间状语四、与现在完成时连用的时间状语 现在完成时的时间状语有现在完成时的时间状语有：for, since, ever,never,just,already, yet, recently, before, in the past/last few years， over the years, over the past few years, many times, so far。Conclusion：1. 现在完成时的含义2. 现在完成时的构成3. 现在完成时过去分词的构成4. 与现在完成时连用的时间状语词