英语人教版八年级下册Unit8 Section A Grammar Focus.pptx

Unit 8Have you read Treasure Island yet?曲周县曲周县 第三中学第三中学 杨胜涛杨胜涛教学目标：教学目标：1.复习本单元复习本单元SectionA词汇词汇 ；2.掌握掌握present perfect tence（一）（一）3.完成课本完成课本 Part 4a and 4b现在完成现在完成时用法（一）：时用法（一）：表示过去发生的动作对现在造成的影响和结果，强强调动作已完成调动作已完成。结构：结构：have/has+动词的过去分词动词的过去分词(过去分词变化规则基本与过去式变化相同。有些特殊变化动词需单独记忆P136)I already (have)lunch.我已经吃过午饭了。(现在我不饿了)havehad一般疑问句一般疑问句：Have/Has主语过去分词其他？肯定回答：Yes，主语have/has.否定回答：No，主语havent/hasnt No，not yet.I have already had lunch.变疑问疑问Have you had lunch yet？你已经吃过午饭了吗？Yes，I .是的，我吃了。No，I .No，.不，还没有.havehaventnot yet否定句：主语have/hasnot过去分词其他I have already had lunch.变否定I have not had lunch yet.have not haventhas not =hasntalready一般用于肯定一般用于肯定句，用于疑问句，用于疑问句时表示惊讶，句时表示惊讶，出乎意料。出乎意料。常放于句中，实义动常放于句中，实义动词之前，助动词之后。词之前，助动词之后。yet一般用于否一般用于否定句或疑定句或疑问问句。句。常放在句尾，常放在句尾，not yet常用在答语中，意为常用在答语中，意为“尚未；还没有尚未；还没有”。already 与与 yet 的区别：的区别：3.现现在完成时与一般过去在完成时与一般过去时区别：时区别：I have cleaned my room.(My room is clean now.)我已经打扫过我的房间了。我已经打扫过我的房间了。I cleaned my room last week.(I did it in the past.)我上周打扫了我的房间。我上周打扫了我的房间。现在完成时把过去的动作和现在的结果联系起来，现在完成时把过去的动作和现在的结果联系起来，一般过去时只限于表示过去的动作本身一般过去时只限于表示过去的动作本身,与现在与现在 的结果无关。的结果无关。注意注意:过去时与过去时与yesterday,last,in 1976,ago,just now等连等连用用，现在完成时与现在完成时与 already,yet,just,ever,never,sometimes,always,often,before,once,twice,recently,lately连用，也与连用，也与today,this morning,this week,this year连连用。用。比比较：较：I have seen him this morning.我上午看见他了。我上午看见他了。(说话时在上午说话时在上午)I saw him this morning.今天上午我遇见了他。今天上午我遇见了他。(说话时可能是下午或者晚上说话时可能是下午或者晚上)Grammar FocusHave you read Little Women yet?Yes,I have./No,I havent.Has Tina read Treasure Island yet?Yes,she has.She thinks its fantastic.Have you decided which book to write about yet?Yes,I have.Ive already finished reading it.It was really good.1.A:Would you like something to drink?B:No,thanks._ (just/drink some tea)2.A:I heard you lost your key._?(find)B:No,not yet.3.A:Do you know when Tom is leaving?B:_.(already/leave)4a.Use the words in brackets to complete the conversations.Ive just drunk some teaHave you found itHe has already left A:When _?(leave)B:This morning.4.A:Is your sister going to the movies with us tonight?B:No._.(already/see the film)5.A:What do your parents think about our plan?B:I _.(not/tell them/yet)did he leaveShe has already seen the filmhave not told them yetSally_(love)reading.In the morning,she reads the newspaper and in the evening she reads books.She _ already _(read)more than 100 different books!Her favorite kind of books is science fiction.She is interested in science and technology and loves to imagine4b.Fill in the blanks with the correct forms of the words in brackets.loveshas readwhat the world _(be)like in 50 years.She _(finish)reading a book about robots last week and _(write)a book report about it next week for her French class.Every time she is in the library,Sally looks at the many books she_(not read)yet and she cant wait to read them!will befinishedwill writehas not readMake a dialogue as 4c.A:What books have you already read?B:Ive already read Tom Sawyer and Harry Potter.A:What do you think of them?B:Well,I think Harry Potter was exciting,but Tom Sawyer was a bit boring.Homework【辨析辨析】leave,leave for,leavefor,leave from(1)leave意意为为“离开离开;出出发发;离去离去”,其后接表示地点的名其后接表示地点的名词词,构成构成“leave+地点名地点名词词”短短语语。When did you leave London?你你们们是什么是什么时时候离开候离开伦伦敦的敦的?(2)leave for后接地点名后接地点名词词表示表示“动动身去某地身去某地”。We are leaving for Rome next week.我我们们下周将要去下周将要去罗马罗马。(3)leavefor表示表示“离开离开去去”。They will leave Nanjing for Hangzhou tomorrow.明天明天他他们们将离开南京去杭州。将离开南京去杭州。(4)leave from表示表示“从从离开离开”,from后的地点是离开后的地点是离开的地方。的地方。Im leaving from school.我要从学校离开。我要从学校离开。and she cant wait to read them!cant wait to do sth.意意为为“迫不及待做某事迫不及待做某事”。The girl cant wait to open the box.这这个女孩迫不及待地要打开个女孩迫不及待地要打开这这个盒子。个盒子。I really cant wait to go on holidays in Australia.我真是迫不及待地想去澳大利我真是迫不及待地想去澳大利亚亚度假。度假。【拓展拓展】(1)wait for sb.to do sth.意思是意思是“等待某等待某人去做某事人去做某事”;wait for sb./sth.意意为为“等待某人或某物等待某人或某物”;wait to do sth.意意为为“等着做某事等着做某事”。Im waiting for James to arrive.我正等着詹姆斯的到来。我正等着詹姆斯的到来。I bought a newspaper and waited for the train.我我买买了一了一张报纸张报纸就等火就等火车车了。了。He is waiting to see the boss.他在等着他在等着见见老板老板动词过去动词过去分词分词的变化规则：的变化规则：(1)一般情况下，在动词原形后加-ed。如：watchwatched。(2)以不发音字母e结尾的加-d。如：livelived。(3)以“辅音字母y”结尾的，变y为i加-ed。如：studystudied;carrycarried;crycried。(4)以重读闭音节结尾，末尾只有一个辅音字母的，先双写该辅音字母，再加-ed。如：stopstopped;planplanned;preferpreferred。(5)不规则动词的过去分词需特殊记忆。