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1、第1页/共28页第一页,共29页。第2页/共28页第二页,共29页。Read the following sentences we have seen.Have 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 i
2、t. It was really good.第3页/共28页第三页,共29页。用法1. 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。 e.g. Have you had your lunch yet? Yes, I have. Ive just had it. (现在 我不饿了。)2. 表示动作或状态从过去某一时刻开始,一直延续(ynx)到现在,而且可能还要继续下去。第4页/共28页第四页,共29页。e.g. I havent seen her these days. Ive known Bob for three years. Ive been at this school f
3、or over two years. 时间(shjin)状语already, yet, just, ever, never, before第5页/共28页第五页,共29页。构成现在(xinzi)完成时是由“助动词have / has+ 动词的过去分词”构成的,规则动词的过去分词构成与过去式相同,不规则动词的过去分词则需逐个记忆。 第6页/共28页第六页,共29页。 动词的过去式的变化和过去分词的变化并不完全相同。我们对它们作了一个大致的分类。 (注:例子中单词(dnc)的变化顺序为:动词原形 动词的过去式 动词的过去分词)第7页/共28页第七页,共29页。一、过去式和过去分词的变化相同规则变化
4、:1. 一般在动词词尾(cwi)直接加ed。如: pick picked picked; wish wished wished; stay stayed stayed2. 以不发音的e结尾的动词后面加d。如:like liked liked; hope hoped hoped; phone phoned phoned第8页/共28页第八页,共29页。3. 以“辅音字母(zm) + y”结尾的动词,变y为i,再加-ed。如: study studied studied; hurry hurried hurried; reply replied replied4. 词尾只有一个辅音字母(zm)的重
5、读闭音节动词,要双写辅音字母(zm),再加-ed。如:stop stopped stopped; clap clapped clapped第9页/共28页第九页,共29页。不规则变化:5. 以不变应万变。如: let let let; put put put; read read read6. 若中间有双写e,则去掉一个(y )e,单词末尾再加t。如: feel felt felt; keep kept kept; sleep slept slept第10页/共28页第十页,共29页。7. 结尾(jiwi)的字母d变t。如: lend lent lent; build built built;
6、 send sent sent8. 变为以-ought或-aught结尾(jiwi)。如: buy bought bought; bring brought brought; catch caught caught; teach taught taught第11页/共28页第十一页,共29页。句式1. 肯定句:主语 + have / has + 过去分词 (+ 其他(qt)2. 否定句:主语 + have / has + not + 过去 分词(+ 其他(qt)3. 一般疑问句:have/ has + 主语 + 过去 分词(+ 其他(qt)第12页/共28页第十二页,共29页。4. 特殊疑问句
7、: 特殊疑问词 (不是(b shi)句子主语) + have / has + 主语+过去分词 (+ 其他)2) 特殊疑问词(是句子主语)+have / has+ 过去分词(+ 其他)第13页/共28页第十三页,共29页。already和yet都可以作为现在完成时的标志词,但它们的用法不同。already一般用于肯定句中。如: We have already cleaned up our classroom. 注意:already用于疑问句中时通常(tngchng)表示惊奇。如: Have you finished your homework already? I cant believe it
8、.第14页/共28页第十四页,共29页。yet一般(ybn)用于疑问句和否定句中。如: Have you seen her yet? The bus hasnt come yet.第15页/共28页第十五页,共29页。1. Write the forms of the past tense and past participle: drink _ _ see _ _ find _ _ leave _ _ tell _ _drank drunksaw seenfound foundleft lefttold told第16页/共28页第十六页,共29页。 Why is Mr. Yang stil
9、l in the teachers office? Maybe he _ his work yet. A. doesnt finish B. hasnt finished C. havent finishedB第17页/共28页第十七页,共29页。 4a Use the words in brackets to complete the conversations.1. A: Would you like something to drink? B: No, thanks. _. (just/ drink some tea)2. A: I heard you lost your key. _?
10、 (find) B: No, not yet.I have just drunk some teaHave you found it第18页/共28页第十八页,共29页。3. A: Do you know when Tom is leaving? B: _. (already/ leave) A: When _? (leave) B: This morning.4. A: Is your sister going to the movies with us tonight? B: No. _. (already/ see the film)He has already leftdid he l
11、eaveShe has already seen the film第19页/共28页第十九页,共29页。5. A: What do your parents think about our plan? B: I _. (not/ tell them/yet)havent told them yet第20页/共28页第二十页,共29页。4b Fill in the blanks with the correct forms of the words in the brackets. Sally _ (love) reading. In the morning she reads the news
12、paper 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 imagine what the world _ (be) like in 50 years. loveshasreadwill be第21页/共28页第二十一页,共29页。 She _ (finis
13、h) 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.finishedwill writehasnt read第22页/共28页第二十二页,共29页。4c Complete the chart with
14、 information about you and your friend.A: What books have you already read?B: I have 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.第23页/共28页第二十三页,共29页。( )【2013广西贵港】 Do you know the movie Lost in Thail
15、and? Yes. I _ it twice. Its funny. A. saw B. see C. have seen D. will see C第24页/共28页第二十四页,共29页。( )【2013黑龙江牡丹江】 Lunch? No, thanks. I_. A. will eat B. am eating C. have eaten( )【2013 湖北黄冈】 Where is Tom? We cant find him anywhere. Perhaps he _ home. A. has come B. is going C. went D. was goingCA第25页/共28页第二十五页,共29页。Retell what you did yesterday and what you have done now.第26页/共28页第二十六页,共29页。第27页/共28页第二十七页,共29页。感谢您的观看(gunkn)!第28页/共28页第二十八页,共2
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