《2017春人教版八年级英语下册课件《unit 8 have you read treasure island yet grammar focus》》由会员分享，可在线阅读，更多相关《2017春人教版八年级英语下册课件《unit 8 have you read treasure island yet grammar focus》（41页珍藏版）》请在金锄头文库上搜索。
1、Unit 8,Grammar focus,Revision,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.,Grammar,The Present Perfect with already, yet,1. Have you watered the plants yet? Yes, I have already watered them. 2. Have you finished your homework yet? Yes, I have already finished it. 3. Have you found your bike yet? Yes, I have already found it.,Present perfect,现在完成时： 表示
3、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，或从过去开始一直延续到现在的动作或保存的状态。,现在完成时的构成: 现在完成时是由“助动词have / has + 动词的过去分词”构成。助动词要和主语的人称、数保持一致。 一般疑问句： have / has ? Yes, I have. No, I havent. Yes, she has. No, she hasnt.,have breakfast,Im not hungry now,moved here in 2004,I still live here,now,past,现在完成时,现在完成时态可用于表达刚刚做完某事或已经做完某事，常
4、见的标志词有already, yet等。下面我们一起看看这几个词的用法: (1) already意为 “已经”，常放在have / has和动词之间，通常用于肯定句中。如: They have already arrived at the hospital. 他们已经到达医院了。 already也可用于疑问句，表示期望得到肯定的回答或表示惊异，此时常放在句末。,(2) yet多用于否定句中，意为“还(没) ”；也常用于疑问句中，意为“现在，已经”。如: The sun has not risen yet. 太阳还没有升起。 Has the man finished the work yet?
5、这个男人做完工作了吗?,Dont worry about him. He has _ arrived at home safely. 2. Have you told him the news _? 3. I have _ eaten some rice. Now I am full.,yet already,already,yet,already,Practice Complete the sentences with the words in the box.,( ) Have you finished your homework _? No, not _. A. yet, already
6、 B. yet, yet C. already, yet D. already, already 分析：此题应该选用B项。前面为疑问句，后面是否定回答，故两处空格均应该用yet 。,B,( ) - Has Jim _ cleaned his bedroom? - Yes, he has cleaned it _. A. just, yet B. already, just C. just, already D. / , already 分析：此题应该选用D项。前面为疑问句，一般不用 just / already提问，故A、B、C项都是错误的，后面是肯定结构，故应该用already。,D,( )
7、 Jim, have you had your lunch _ ? Its only 10:30 in the morning . A. yet B. just now C. just D. already 分析：此题应该选用D项。前面为疑问句，但是从“Its only 10:30 in the morning .”中可以看出问话人非常惊讶，故应该用already连接。,D,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：例子中单词的变化顺序为：动词原形 动词的过去式 动词的过去分词),一、过去式和过去分词的变化相同 规则变化： 一般在动词词尾直接加ed。
8、如： pick picked picked; wish wished wished; stay stayed stayed 2. 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,3. 以“辅音字母 + y”结尾的动词，变y为i，再加-ed。如： study studied studied; hurry hurried hurried; reply replied replied 4. 词尾只有一个辅音字母的重读闭音节动词，要双写辅音字母，再加-ed。如： stop stopped stoppe
9、d; clap clapped clapped,不规则变化： 5. 以不变应万变。如： let let let; put put put; read read read 6. 若中间有双写e，则去掉一个e，单词末尾再加t。如： feel felt felt; keep kept kept; sleep slept slept,7. 结尾的字母d变t。如： lend lent lent; build built built; send sent sent 8. 变为以-ought或-aught结尾。如： buy bought bought; bring brought brought; catc
10、h caught caught; teach taught taught,活学活用,1. Write the forms of the past tense and past participle: drink _ _ see _ _ find _ _ leave _ _ tell _ _,drank drunk,saw seen,found found,left left,told told,Why is Mr. Yang still in the teachers office? Maybe he _ his work yet. A. doesnt finish B. hasnt fini
11、shed C. havent finished,B,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，或从过去开始一直延续到现在的动作或保存的状态，强调的是现在的情况，不能和表示过去的时间状语连用（如：in 1990，last Sunday 等）。,一般过去时：一般过去时只表示过去的动作或状态，和现在不发生关系（即动作或状态在现在已经结束），它可以和表示过去的时间状语连用。,现在完成时与一般过去时的区别：,I saw this film yesterday. （强调看的动作发生过了） I have seen this film. （强调对现在的影响，电影的内容已经知道了） W
12、hy did you get up so early? （强调起床的动作已发生过了） Who hasnt handed in his paper? （强调有卷子未交，疑为不公平竞争）,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. _? (find) B: No, not yet.,Ive ju
13、st drunk some tea,Have you found it yet?,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),Tom/He has already left,did he leave,She has already seen the film,5.
14、 A: What do your parents think about our plan? B: I _. (not / tell them / yet),have not/havent told them yet,4b,Fill in the blanks with the correct forms of the words in brackets.,Sally _ (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 imagine what the world _ (be) like in 50 years.,loves,has,read,will be,She _ (finish) reading a book about robots last week and _ (write) a
