七年級英語 _ 一般現(xiàn)在時態(tài)講解

1、七年級英語 一般現(xiàn)在時態(tài)講解【教學(xué)目標(biāo)】² 能正確地認(rèn)識并熟練運用一般現(xiàn)在時態(tài)² 能熟練掌握運用動詞“三單”的變化規(guī)則² 能分清哪些主語是第三人稱單數(shù)² 能運用一般現(xiàn)在時態(tài)進(jìn)行句子轉(zhuǎn)換【語法講解】一、定義與講解一般現(xiàn)在時表示經(jīng)常性或習(xí)慣性的動作或一般性事實。，也可表示現(xiàn)在的狀態(tài)或主語具備的性格和能力。 通常與every day, always, usually, often, sometimes等時間狀語連用。 （1）表示事物或人物的特征及狀態(tài)。The sky is blue. She is eight. Marys father is an Engli

2、sh teacher. （2）表示經(jīng)常性或習(xí)慣性的動作。I get up at six every day. She reads English every morning. （3）表示主語具備的性格和能力。 I like bananas. We speak Chinese. He likes ice-cream. She doesnt like apples. （4）表示客觀現(xiàn)實。The table has four legs. There are 50 students in my class. （5）表示不受時間限制的客觀真理，科學(xué)原理，自然現(xiàn)象及客觀事實規(guī)律或格言諺語等。The sun

3、 rises in the east every day.太陽每天從東方升起。The earth goes around the sun.地球繞著太陽轉(zhuǎn)。 Time and tide wait for no man. 歲月不饒人。 Practice makes perfect. 熟能生巧。（諺語） Two and seven is nine. （6）表示按照時間表、日程表上所安排或計劃好的將來的動作。The train leaves Chengdu at 6. We have 4 classes in the morning.2 在一般現(xiàn)在時中，只有主語在第三人稱單數(shù)時用動詞的“三單形式”，其

4、他人稱用動詞原形。 動詞三單形式的變化規(guī)則：1.（1）一般情況直接在動詞詞尾加-s. play plays like likes ask-asks work-works get-gets call-calls（2）以字母s, x, ch, sh或o結(jié)尾的動詞，在詞尾直接加-es. watch-watches wish-wishes do-does go-goes pass-passes teach-teaches （3）以“輔音字母加 - y”結(jié)尾的動詞，要先變y為i再加-es. try-tries study-studies cry-cries fly-flies carry-carries

5、2. 不規(guī)則變化：be- is have-has但有些同學(xué)們對于哪些主語是第三人稱單數(shù)還不十分清楚，現(xiàn)歸納總結(jié)如下： 一、人稱代詞he, she, it是第三人稱單數(shù)。如： He likes watching TV. 他喜歡看電視。 She has lunch at twelve. 她十二點吃午餐。 二、單個人名、地名或稱呼作主語是第三人稱單數(shù)。如： Tom likes coffee. Beijing is in China. Uncle Wang often plays football. 三、單數(shù)可數(shù)名詞或"this / that / the+單數(shù)可數(shù)名詞"作主語是第三

6、人稱單數(shù)。如： A pen is on her desk. This book is yours. That car is red. The cat is mine. 四、不定代詞someone, somebody, nobody, everything, something等,以及指示代詞this, that作主語是第三人稱單數(shù)。 Everyone is here. Something is wrong with my watch. This is an apple. That is a cup.五、不可數(shù)名詞作主語時為第三人稱單數(shù)。如： The milk is in the glass.

7、The bread is small. 六、當(dāng)數(shù)字或字母作主語時，看作第三人稱單數(shù)。如： "6" is a lucky number. "I" is a letter. 3、 一般現(xiàn)在時的結(jié)構(gòu)及句子轉(zhuǎn)換： (一) 結(jié)構(gòu) 含be動詞的句子 含實義動詞的句子 肯定句： 主語+am/is/are+其他成分. 主語+動詞原形/動詞三單+其他成分. 否定句： 主語+am/is/are not +其他成分. 主語+dont/doesnt+動詞原形+其他成分. 一般疑問句：Am/Is/Are +主語+其他成分? Do/Does +主語+動詞原形+其他成分?肯/否定回答

8、： Yes, 主語+am/is/are. Yes, 主語+do/does. No, 主語+am/is/are not. No, 主語+dont/doesnt. 特殊疑問句：特殊疑問詞+am/is/are +主語+其他成分? 特殊疑問詞+do/does +主語+動詞原形+其他成分?（二）句子轉(zhuǎn)換（1）變一般疑問句：當(dāng)句子中有be動詞或情態(tài)動詞時，則把be動詞或情態(tài)動詞(can,could等)提到主語的前面，（口訣：一調(diào)二變?nèi)龁柼枺?）變否定句：在be動詞或情態(tài)動詞后面直接加not變成否定句. (be后not莫忘記)例：陳述句：She is my sister.疑問句 Is she your s

9、ister? Yes, she is./ No, she is not(isnt).否定句 She is not my sister.陳述句：I can play soccer.疑問句 Can you play soccer? Yes,I can./ No, I cant(can not).否定句 I can not /cant play soccer. 注意: 對一般疑問句的回答：一般用什么問就用什么來回答，但以下例外：Is this a pencil? Yes , it is./ No, it isnt.Is that your backpack? Yes , it is./ No, it

10、 isnt. Are these your parents? Yes, theyre./ No, they arent. Are those Jims brothers? Yes, theyre./ No, they arent.（3）當(dāng)句子中沒有be動詞，也沒有情態(tài)動詞時，變一般疑問句時，在主語前加助動詞do (I, we, you,以及復(fù)數(shù)), does（第三人稱單數(shù)she,he,it等）變成問句；（4）變否定句時，在主語后謂語動詞前加助動詞dont , doesnt變成否定句，切記：助動詞后的動詞則還原成動詞原形。例：陳述句：We get up at 7:00 every morning

11、. 疑問句Do you get up at 7:00 every morning?否定句We dont get up at 7:00 every morning. 陳述句：She has a brother.疑問句 Does she have a brother? 否定句 She doesnt have a brother.鞏固練習(xí)題： 1、 寫出下列動詞的第三人稱單數(shù)形式。 have like go stay make look come watch fly study do teach 2、 用Be動詞填空。1. you Li Fen ? No, not . 4. Which class

12、you in ? 2. Mr. Green very busy? Yes , he . 5. You and I good friends . 3. This book very interesting . 6. The basketball club fun . 三用所給動詞的適當(dāng)形式填空。 1. Lin Tao (like) his ruler . 2. Lets (have) ice-cream . 3. Lets (play) tennis ! 4. He (like) English. 5. Nice (meet) you ! 6. I (need) some fruits. 4、

13、用括號內(nèi)動詞的適當(dāng)形式填空。1. He often _(have) dinner at home. 2. Daniel and Tommy _(be) in Class One.3. We (not watch) TV on Monday. 4. Nick (not go) to the zoo on Sunday.5. _ they _(like) pears? 6. _ your parents _(have) eggs every day?7. There _(be) some water in the bottle. 8. Mike _(like) cooking. 9. They _

14、(have) the same hobby. 10. Liu Tao _ _(do) not like tea.11. Maths （be）easy. 12. This boy often _(watch) TV in the evening. 5、 按照要求改寫句子1This is my pencil ? (改為一般疑問句) 2. These red socks are Kates . (改為一般疑問句) your pencil ? socks Kates ? 3. Mary does not have any books . (改為肯定句) 4. She likes the black b

15、ag very much . (改為否定句) Mary books . 5. I like apples. (用she作主語改寫句子) 6. Daniel watches TV every evening.(改為否定句) 7. He has hamburger and apples for dinner . (同1) 8. Its an English dictionary . (對畫線部分提問) 9. I do my homework every day.(同1，否答) 10. She likes milk.(同1，肯答) _ 11. Amy likes playing computer g

16、ames.(同1，否答) 12. We go to school every morning.(改為否定句) 13. John comes from Canada（加拿大）.(同8) 14. She has a beautiful ring.(同1，否答) 15. Simon and Daniel like play sports .(同4) 16. Do you often play football after school? (肯答) _ 17. Gao Shans sister likes playing table tennis.(同4) 18. I have m

17、any books.  （同4） 19. I watch TV every day.（改為一般疑問句） 20. Do you often play basketball? (改為陳述句) 六、改錯(劃出錯誤的地方，并將正確的寫在右邊的橫線上)1. Is your brother speak English? 2. Does he likes going fishing? 3. He likes play games after class. 4. Mr. Wu teachs us English. 5. She dont do her homework on Su

18、ndays. 6. Police is there. 一般現(xiàn)在時態(tài)句型轉(zhuǎn)換1. This is a white key. (對畫線部分進(jìn)行提問) 2. Bens bag is yellow and red . (對畫線部分進(jìn)行提問) 3. Her name is Gina. (對畫線部分進(jìn)行提問) 4. My phone number is 673-8220. (對畫線部分進(jìn)行提問) 5. The boys name is Jack. (對畫線部分進(jìn)行提問) 6. The picture is on the wall. (對畫線部分進(jìn)行提問) 7. Your baseball is under

19、 the chair. (對畫線部分進(jìn)行提問) 8. His book is on the desk. (對畫線部分進(jìn)行提問) 9. Some balls are in the dresser. (對畫線部分進(jìn)行提問) 10. My computer is on my desk. (對畫線部分進(jìn)行提問) 11. He is Johnny. (改為一般疑問句) 12. These are his parents. (改為一般疑問句) 13. This is my sister. (改為一般疑問句) 14. The baseball is under the bed. (改為一般疑問句) 15.

20、My key is on the bed. (改為一般疑問句) 16. He has a tennis racket. (改為一般疑問句) 17. I have some baseball bats. (改為一般疑問句)18. She has many things to do today. (改為一般疑問句)19. I like hamburgers . (改為一般疑問句)20. They have a TV. (改為一般疑問句)21. My English teacher is fine. (改為同義句)22. Im Zhang Na. (改為同義句)23. Hello! My name is Gina. (改為同義句)24. Im her son. (改為同義句)25. You are Tina. (改為否定句)26. These are my brothers. (改為否定句)27. The books are on the bookcase. (改為否定句28. She has a computer game. (改為否定句)29. We have a bi