由肯定句變?yōu)橐话阋蓡柧?o:p>
1、謂語動詞是be動詞時(shí)，把be動詞提前放句首大寫，其他成分可照搬不動。
（注：在肯定句和一般疑問句中主語的一、二人稱要互換。）
2、謂語動詞中如果有情態(tài)動詞，則把情態(tài)動詞提前放句首大寫，其他成分可照搬不動。（注：在肯定句和一般疑問句中主語的一、二人稱要互換。）
3、謂語動詞是行為動詞的一般現(xiàn)在時(shí)或一般過去時(shí)，在改為一般疑問句的時(shí)候，根據(jù)主語的人稱和單、復(fù)數(shù)，需要借助助動詞do、does或did ，把助動詞放句首大寫，其他成分位置可不懂，有了助動詞，動詞就要用原形。
二、由肯定句變?yōu)榉穸ň?/span>
肯定句變否定句一定要加not。謂語動詞是be動詞時(shí)或情態(tài)動詞時(shí)，直接在be動詞、情態(tài)動詞后not 。除了be動詞的am外，否定詞not都可以和前面的be動詞或情態(tài)動詞縮寫。如果謂語動詞是行為動詞的一般現(xiàn)在時(shí)或一般過去時(shí)，則要在動詞前加助動詞do、does或did，再在其后添加否定詞not，分別可以縮寫為don't、doesn't和didn't ，有了助動詞，動詞就要用原形。
下面幾種句型在變?yōu)榉穸ň鋾r(shí)情況特殊一些，做題時(shí)須引起注意：
(1) think + 賓語從句，變否定時(shí)，not放在主句上，即：I don't think + 賓語從句。
eg. I think it will rain tomorrow .→ I don't think it will rain tomorrow .
(2) 祈使句沒有主語，以動詞原形開頭。變?yōu)榉穸〞r(shí)，在動詞原形之前添加助動詞don't .
eg. (1) Water the flowers .→ Don't water the flowers .
(2) Please clean the blackboard .→ Please don't clean the blackboard .
三、句子的單復(fù)數(shù)互換
對應(yīng)句中的名詞、代詞、動詞等，能變則變，不能變的，要么保留，要么去掉。要求必須掌握名詞的單復(fù)數(shù)的變化規(guī)則，代詞對應(yīng)的人稱和單復(fù)數(shù)，動詞的第三人稱單數(shù)的變化規(guī)則等。具體情況具體對待。(1) The girl is from England .→ The girls are from England .
(2) He is a polite and helpful boy .→ They are polite and helpful boys .
上述例句中，劃線的為能變的，沒劃線的為該保留的，a(an)為該去掉的。反之，在由復(fù)數(shù)變?yōu)閱螖?shù)時(shí)，則要根據(jù)句意在名詞之前補(bǔ)上一個(gè)a (an)。
eg. They are English girls .→ She is an English girl.
但是對于"There be"句型，單復(fù)數(shù)轉(zhuǎn)換時(shí)句中的 a / an不能去掉，而要根據(jù)句式將其與some或any 互換。
eg. (1) There is a boat on the lake .→ There are some boats on the lake .
(2)There isn't a tree behind the house .→ There aren't any trees behind the house .
(3) Is there a pet dog in your home ?→ Are there any pet dogs in your home ?
(4) There aren't any pictures on the wall of our classroom .
→ There isn't a picture on the wall of our classroom .
四、同義句轉(zhuǎn)換 （詞匯的同義轉(zhuǎn)換、句型的同義轉(zhuǎn)換）
五、對句中的劃線部分提問
1、首先根據(jù)劃線部分確定疑問詞，將疑問詞放句首大寫。
主要的疑問詞有：what , who , when , whose , where , why , which , how , how old , how many , how much , how long , how often , how soon , how far等。
what :用來詢問事物、人的姓名和職業(yè)。另外，和不同的詞一起使用還可詢問具體的方面， 如what time 詢問時(shí)間，what colour 詢問顏色等。
who :用來詢問人，尤其指人與人之間的關(guān)系。whose :用來詢問歸屬，即和人之間的所有關(guān)系。when :用來詢問時(shí)間，一般指較大的時(shí)間范圍。（小范圍的時(shí)間可用what time ）
where :用來詢問地點(diǎn)。which :用來詢問哪一個(gè)，主要針對名詞的定語提問。
why :用來詢問原因，標(biāo)志是because . how :用來詢問方式、程度。
how old :用來詢問年齡。how many 用來詢問可數(shù)名詞的數(shù)量，其后要接名詞的復(fù)數(shù)形式。
how much :用來詢問不可數(shù)名詞的數(shù)量，其后要接不可數(shù)名詞。如單獨(dú)使用則表示詢問多少錢或?qū)κ挛锪私饣蛳矚g的程度。how long :用來詢問事物的長度，也可詢問時(shí)間長度。
how often :用來詢問某件事或某個(gè)動作在一定的時(shí)間范圍內(nèi)重復(fù)發(fā)生的次數(shù)，即頻度。
how soon :用來詢問某件事或某個(gè)動作從說話時(shí)候起要過多久才會發(fā)生，即詢問將來的情況，一般與將來時(shí)態(tài)連用。how far :用來詢問空間距離。
2、把原句變?yōu)橐话阋蓡柧洹?/span>
3、劃線部分省略。
注：如果句中的劃線部分是主語或主語的定語，則可用疑問詞直接替換而不用一般疑問句的語序。
eg.1、The boy on the yellow bike is Lucy's brother .
本句中的劃線部分on the yellow bike 在句中作主語The boy 的定語，限定是哪一個(gè)男孩，因而確定的疑問詞是which, 直接替換后的句子為： Which boy is Lucy's brother ?
【練習(xí)題】
1. Is this a ruler？(作否定回答) ____, it ____.
2. Dick is sixteen.(對畫線部分提問) ____ ____ is Dick?
3. That’s an English book.(改為復(fù)數(shù)句) ____ ____ English books.
4. They are in Class One, Grade Seven.(對畫線部分提問) ____ class are they ____?
5. That is my mom.(對畫線部分提問) ____ ____ that?
6. Are you from China？(作肯定回答) ____, I ____.
7. I’m Li Hua.(同義句轉(zhuǎn)換) ____ ____ is Li Hua.
8. These are desks in English.(對畫線部分提問) ____ ____ these in English?
9. I am in Grade Seven.(改為一般疑問句) ____ ____ in Grade Seven?
10. He has short hair.(改為一般疑問句) ____ he ____ short hair?
11. Do you have a sister?(作否定回答) ____, I ____.
12. She has long legs.(同義句轉(zhuǎn)換) ____ legs ____ long.
13. I am from China.(同義句轉(zhuǎn)換) I ____ ____China.
14. We aren’t in the same class.(同義句轉(zhuǎn)換) We are in ____ ____.
15. My pants are black.(對畫線部分提問) ____ ____ are your pants?
16. Mike has blond hair and blue eyes. (對畫線部分提問) ____ ____ Mike look like?
17. Li Ming and Li Lei look the same.(同義句轉(zhuǎn)換) Li Ming ____ ____ Li Lei.
18. Please give her the pen.(同義句轉(zhuǎn)換) Please give the pen ____ ____.
19. Those apples are red.(同義句轉(zhuǎn)換) Those are ____ ____.
20 They are my books. (對畫線部分提問) ____ ____ are they?
21. She has black hair. (改為一般疑問句) ____ she ____ black hair?
22. Her skirt is yellow. (對畫線部分提問) ____ ____ is her skirt?
23. Tom’s face is round. (同義句轉(zhuǎn)換) Tom ____ ____ round face.
24. Does Mary have a round face? (作肯定回答) ____, she ____.
25. She has a new bike.(改為否定句) She ____ ____ a new bike.
26. They are English.(同義句轉(zhuǎn)換) They are ____ ____.
27. My sister is eleven.(對畫線部分提問) ____ ____ is your sister?
28. Tom has big eyes.(改為一般疑問句) ____ Tom ____big eyes?
29. They are their apples.(對畫線部分提問) ____ ____ are these?
30. The dress is only 30 yuan.(對畫線部分提問) ____ ____ is the dress?
31. May I help you?(同義句轉(zhuǎn)換) ____ can I ____ ____ you?
32. How do you like this book?(同義句轉(zhuǎn)換) ____ do you ____ of this book?
33. I want some fish.(改為否定句) I ____ want ____ fish.
34. Do you have time now?(同義句轉(zhuǎn)換) ____ you ____ now?
35. John has a nice dog. (改為一般疑問句) ____ John ____ a nice dog?
36. Lucy would like some apples.(對畫線部分提問) ____ ____ Lucy ____?
37. Speak Chinese in class.(改為否定句) ____ ____ Chinese in class.
38. He often goes to Yangyang’s home at eight o’clock. (對畫線部分提問)
What ____ does he often ____ to Yangyang’s home?
39. What time is it?(同義句轉(zhuǎn)換) ____ the time?
40. It’s twelve forty-five.(同義句轉(zhuǎn)換) It’s ____ ____ ____ one.
41. Thank you. You help me.(合成一句) Thank you ____ your ____.
42. Mike has six books. (改為否定句) Mike ____ ____ six books.
43. The boy is John. (對畫線部分提問) ____ the boy?
44. My penfriend lives in England. (對畫線部分提問) ____ ____ your penfriend ____?
45. Helen is my friend. Amy is my friend, too.(并為一句)Helen and Amy ____ ____ my ____.
46.The old man usually walks to the shop.(改為同義句)
The old man usually goes to the shop _____ _____ .
47.Mike often goes to the zoo by bus.(改為同義句) Mike often _____ a _____ to the zoo.
48.Mrs.Read goes shopping three times a week.(對畫線部分提問)
_____ _____ does Mrs.Read go shopping?
49.I usually read books on Sundays.(對畫線部分提問)
_____ do you usually _____ on Sundays?
50.Maria often takes the subway home.(改為一般疑問句)
_____ Maria often _____ the subway home?
51.We have six lessons every day. (對畫線部分提問)
__________________________________________________
52.I listen to the radio every Friday.(改成現(xiàn)在進(jìn)行時(shí))
__________________________________________________
53.I like geography best.(對畫線部分提問)
__________________________________________________
54.It’s not easy to study English well.(改為同義句)
__________________________________________________
55.How does she like math?(改為同義句)
__________________________________________________
56.It’s Wednesday today.(對畫線部分提問) _____ _____ is it today?
57.Tom watches TV three times a week.(對畫線部分提問)
_____ _____ does Tom watch TV?
58.The lesson begins at eight o’clock.(對畫線部分提問)
_____ _____ does the lesson _____ ?
59.The students are playing soccer on the playground.(改為一般疑問句)
_____ the students _____ soccer on the playground?
60.Maria likes living in China because she loves the people and the food here.(對畫線部分提問) _____ _____ Maria like living in China?
61.Sometimes Dick and Jack go to work by car. (改為同義句)
Sometimes Dick and Jack _____ _____ work.
62.Excuse me, how can I get to the bank? (改為同義句)
Excuse me, could you tell me _____ _____ to the bank?
63.How many workers are there in your factory? (改為同義句)
How many workers _____ your factory _____ ?
64.Paul usually goes to the library once a week. (對畫線部分提問)
_____ _____ does Paul usually go to the library?
65.Please open the door. (改為否定句) _____ _____ the door, please.
66.They were born in a town in Beijing. (改成一般疑問句)
_____ they _____ in a town in Beijing?
67.It was July 7th, 2006 yesterday. (對畫線部分提問) _____ was the _____ yesterday?
68.The computer is about 35 centimeters wide. (對畫線部分提問)
_____ _____ is the computer?
69.What shape is your present? (改為同義句) _____ _____ _____ of your present?
70.We use the MP3 to listen to the music. (對畫線部分提問)
_____ do we use the MP3 _____ ?
71.The twins(雙胞胎) are good at playing soccer.(改為同義句)
The twins _____ _____ _____ playing soccer.
72.He can draw pictures. (對畫線部分提問) _____ can he ____?
73.Li Fang could swim when she was six years old.(改為同義句)
Li Fang could swim at the _____ _____ six.
74.Could you skate when you were five?(作否定回答)
____________________________________________________________
75.Bill can swim.(用jump 改為選擇疑問句) _____ Bill swim _____ jump?
76.I did my homework at home yesterday.(改為否定句)
I _____ _____ my homework at home yesterday.
77.Lucy recited a Chinese poem at her birthday party. (改為一般疑問句)
_____ Lucy _____ a Chinese poem at her birthday party?
78.Did you enjoy yourselves at the party?(改為同義句)
Did you _____ _____ _____ _____ at the party?
79.I came back home at 9:30 last night. (對畫線部分提問)
_____ _____ did you come back home last night?
80.Lucy and Lily sang English songs and performed ballet at the party.(對畫線部分提問)
_____ _____ Lucy and Lily _____ at the party?
81.Jim is at home. (改為否定句) Jim _____ _____ at home yesterday.
82.He sang an English song yesterday. (對畫線部分提問) What _____ he _____ yesterday?
83.They had a good time at the party last night. (改為同義句)
They _____ _____ at the party last night.
84.He can swim now. (改為否定句) He _____ swim when he was 7 years old.
85.They played basketball on the playground yesterday afternoon.(對畫線部分提問)
_____ _____ they _____ on the playground yesterday afternoon?
86.It’s very wet and cloudy today.(對畫線部分提問) _____ is the weather _____ today?
87.Helen usually comes to school on foot.(改為同義句) Helen usually _____ _____ school.
88.You mustn’t play football in the street.(改為祈使句) _____ _____ football in the street.
89.The girl went to the hospital with the old woman.(改為否定句)
The girl _____ _____ to the hospital with the old woman.
90.There is a woman doctor in the hospital.(改為復(fù)數(shù))
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