语气和句式是不太一样的。
一般来说，疑问句是疑问语气，陈述句是陈述语气。当然，也可能陈述句用疑问语气说，表示一种怀疑的态度。It's Tuesday(升调）今天周二？（表示不确定）
还有比如一句话可以同时有两种语气
it's beautiful, isn't it前半句就是陈述语气（降调），后面是疑问语气（升调）
反问句后面有问号陈述句是句号反问句变陈述句：先去掉反问词，再进行否定（加一个否定词或者减一个否定词使句子变通顺），最后将问号改为句好。即：反问句变陈述句，去掉问号，有加强反问的语气词去掉，在变换后的陈述句中适当的地方必须加一个否定词，才与原反问句意思一致。比如：“难道他承认人的正确思想是从天上掉下来的吗？”变换陈述句：“他不承认人的正确思想是从天上掉下来的。”若变换为“他承认人的正确思想不是从天上掉下来的。”就与原反问句的意思不一致了，答案就是错的，因为否定词“不”放的位置不当。陈述句变反问句：先将原句进行否定（即改成个否定句），然后加上表反问的语气词（句子一定要通顺），最后将句号改为问号。即：同样，肯定句变反问句，在变换后的反问句中，必须在适当的地方加一个否定词，才与原句意思一致。比如：“你应该去看他。”变为：“难道你不应该去看他吗？”否定句变反问句，去掉句中否定词或在变换后的反问句中再放上一个否定词，才与原句意思相符。比如：“他不应该看她。”变为“难道他应该去看她吗？”或“难道他不应该不去看她吗？”由此可见：反问句的问号，起了一个否定词的作用。反问句是对一个肯定内容或否定内容的否定。
一、陈述句：是用来陈述一件事情或表示一种看法，可分为肯定句和否定句两种形式。
1、谓语动词是be动词,助动词have, has, will,情态动词can等时，只要直接在这些词后面加not就构成否定形式。
eg Lily has already read this new book (改为否定句)
Lily ______ ______ this new book ________
2、谓语动词是行为动词而又没有助动词或情态动词时，必须在谓语动词前加助动词，一般现在时加助动词do ，第三人称单数加does，一般过去时加did，再和not构成否定结构。必须指出的是：don't, doesn't, didn't后都用动词原形。
eg1)Jill has lunch at school every day (改为否定句)
Jill _____ _____ lunch at school every day
2)The children had a good time at the party (改为否定句)
The children ______ _____ a good time at the party
3)Rose didn't drink any milk this morning（改为肯定句)
Rose ______ ______ milk this morning
二、疑问句：是用来提出问题的句子。
A一般疑问句：以be动词, have /has/do等助动词、can/may等情态动词开头，以yes或no来回答的问句。
它的基本结构是：Be/Have /Has/Did等助动词（包括情态动词）＋主语＋谓语（包括表语）＋┄？回答常用简略回答。
1、谓语动词是be动词、助动词、情态动词时，只要直接把这些词置于句首，句末改成问号。
eg There's something wrong with his bike（改成疑问句）
______ _____ _______ wrong with his bike
2、谓语动词是行为动词时，必须在句首加上助动词Do、Does（三单）、Did（过去式）加上这些助动词后，句子中谓语动词必须用原形。
eg 1)Edison built a science lab himself when he was ten （改成疑问句）
______ Edison ______ a science lab himself when he was ten？
2)Those Japanese like Chinese food（改成疑问句）
______ those Japanese ________ Chinese food
注意：在把肯定句改成否定句或一般疑问句的时候,要注意句中是否有already、some、something、somebody等词，如果有也必须进行改变，already要改成yet，some、something、somebody等分别改成any、anything、anybody等。另外，在改成否定句的时候注意把too改成either,both改成neither,all改成none等在改成一般疑问句的时候，常常把第一人称I、we改成第二人称you。
B特殊疑问句：以疑问代词或疑问副词开头，提出疑问的句子。
它的基本结构是：特殊疑问词＋一般疑问句语序。但是如果疑问词在句子中作主语或作主语的定语，就用特殊疑问词＋陈述句语序。常用的疑问词有：what, who(whom), whose,which,when,where,how,why等，回答时针对问句中的代词和副词来回答，不用yes或no来回答。
1)对指物名词或谓语动词提出疑问，疑问词用what
①The twins were making a kite when their mother came in （划线提问）
______ _____ the twins _____ when their mother came in
②Mrs Turner asked her son to buy some eggs for supper （划线提问）
_______ ______ Mrs Turner ask her son ______ _______
2)对名词前定语提出疑问，疑问词应用which，而且必须和名词连用。
I'm going to take the shirt on the right（划线提问）
______ _____ are you going to take
3)对指人名词或代词提问用who，作宾语时提问用whom。
egLi Ping,they,his father
4)对物主代词和名词所有格提问用whose。
eg Li Ping's coat→Whose coat my father→Whose father
5)对具体时间提出疑问，如 in the morning,last Sunday等，疑问词用when；对具体几点钟提问，疑问词应用what time。
6)对具体地点提出疑问，疑问词应用where。
The pupils are having a picnic at the foot of the hill （划线提问）
_____ _____ the pupils having a picnic
7)对表原因的从句提问，常见的有because引导的从句，疑问词应用why。
Xiao Cheng didn't go to the farm with us because he was ill （划线提问）
_______ _____ Xiao Cheng go to the farm with us
8)对方式或程度等提出疑问，用疑问词How。
eg go by bike like very much
9)对数量提出疑问，疑问词为How many，要注意how many必须跟名词的复数形式。
eg two hundred sheep→How many sheep
10)对价格提出疑问，疑问词用How much。
eg I paid fifty yuan for the sweater
______ ______ did you pay for the sweater
11)对时间长度提出疑问，疑问词应用How long。
eg I've worked in that factory for two years （划线提问）96中考题
______ _____ _______ you worked in that factory
12)对时间频率，如 once a year, twice a week等提问，疑问词用How often。
13)对具体次数，如 once, twice, three times等提问，疑问词用How many times。
eg ______ did he call you the day before yesterdayTwice 96中考题
AWhat time BHow many times CHow much DHow long
14)对in＋一段时间提问，疑问词一般用How soon。
eg Jane and her brother will finish the work in two hours （划线提问）
_____ _____ _____ Jane and her brother finish the work
15)对距离提出疑问，疑问词用How far。
eg It's about two kilometres from here to the country（划线提问）
______ _____ _____ _____ from here to the country
16)另外，对日期、星期、天气等提出疑问，则分别用
What's the date
What day is it 如果是过去时间，就用was代替is。
What's the weather like
练习题
1)She does exercises at home in the evening（改成否定句、一般疑问句）
She ______ ______ exercises at home in the evening
______ she _____ exercises at home in the evening
2)He said something important at the meeting（改为否定句,一般疑问句）
He _____ ______ ______ important at the meeting
______ he ______ ______ important at the meeting
3)It'll take them three weeks to finish the work（划线提问）
______ ______ _______ it take them to finish the work
4)I have to wash all the plates and things after meals（划线提问）
_____ _____ you have to wash all the plates and things
5)The woman in the red coat is her mother（划线提问）
______ ______ is her mother
6)Li Ping spent twenty yuan on the dictionary（划线提问）
_____ ____ ____ Li Ping _____ on the dictionary
思考题
1)The worker's visited the factory already（改成否定句、一般疑问句）
The worker _____ _____ the factory ______
____ the worker ___ the factory __
2)Both of his parents are workers（改成否定句）
___ of his parents ______ a worker
3)He went to the park with his sister（划线提问）
_____ ____ ____ he go to the park
4)We really enjoyed working on the farm（划线提问）
What _____ you really enjoy ______
5)She writes to her parents once a week（划线提问）
_______ ______ ______ she write to her parents
6)Our PE teacher has been at this school since he came（划线提问）
______ ______ ______ our PE teacher been at this school
一、陈述句：是用来陈述一件事情或表示一种看法，可分为肯定句和否定句两种形式。
1、谓语动词是be动词,助动词have, has, will,情态动词can等时，只要直接在这些词后面加not就构成否定形式。
eg Lily has already read this new book (改为否定句)
Lily ______ ______ this new book ________
2、谓语动词是行为动词而又没有助动词或情态动词时，必须在谓语动词前加助动词，一般现在时加助动词do ，第三人称单数加does，一般过去时加did，再和not构成否定结构。必须指出的是：don't, doesn't, didn't后都用动词原形。
eg1)Jill has lunch at school every day (改为否定句)
Jill _____ _____ lunch at school every day
2)The children had a good time at the party (改为否定句)
The children ______ _____ a good time at the party
3)Rose didn't drink any milk this morning（改为肯定句)
Rose ______ ______ milk this morning
二、疑问句：是用来提出问题的句子。
A一般疑问句：以be动词, have /has/do等助动词、can/may等情态动词开头，以yes或no来回答的问句。
它的基本结构是：Be/Have /Has/Did等助动词（包括情态动词）＋主语＋谓语（包括表语）＋┄？回答常用简略回答。
1、谓语动词是be动词、助动词、情态动词时，只要直接把这些词置于句首，句末改成问号。
eg There's something wrong with his bike（改成疑问句）
______ _____ _______ wrong with his bike
2、谓语动词是行为动词时，必须在句首加上助动词Do、Does（三单）、Did（过去式）加上这些助动词后，句子中谓语动词必须用原形。
eg 1)Edison built a science lab himself when he was ten （改成疑问句）
______ Edison ______ a science lab himself when he was ten？
2)Those Japanese like Chinese food（改成疑问句）
______ those Japanese ________ Chinese food
注意：在把肯定句改成否定句或一般疑问句的时候,要注意句中是否有already、some、something、somebody等词，如果有也必须进行改变，already要改成yet，some、something、somebody等分别改成any、anything、anybody等。另外，在改成否定句的时候注意把too改成either,both改成neither,all改成none等在改成一般疑问句的时候，常常把第一人称I、we改成第二人称you。
B特殊疑问句：以疑问代词或疑问副词开头，提出疑问的句子。
它的基本结构是：特殊疑问词＋一般疑问句语序。但是如果疑问词在句子中作主语或作主语的定语，就用特殊疑问词＋陈述句语序。常用的疑问词有：what, who(whom), whose,which,when,where,how,why等，回答时针对问句中的代词和副词来回答，不用yes或no来回答。
1)对指物名词或谓语动词提出疑问，疑问词用what
①The twins were making a kite when their mother came in （划线提问）
______ _____ the twins _____ when their mother came in
②Mrs Turner asked her son to buy some eggs for supper （划线提问）
_______ ______ Mrs Turner ask her son ______ _______
2)对名词前定语提出疑问，疑问词应用which，而且必须和名词连用。
I'm going to take the shirt on the right（划线提问）
______ _____ are you going to take
3)对指人名词或代词提问用who，作宾语时提问用whom。
egLi Ping,they,his father
4)对物主代词和名词所有格提问用whose。
eg Li Ping's coat→Whose coat my father→Whose father
5)对具体时间提出疑问，如 in the morning,last Sunday等，疑问词用when；对具体几点钟提问，疑问词应用what time。
6)对具体地点提出疑问，疑问词应用where。
The pupils are having a picnic at the foot of the hill （划线提问）
_____ _____ the pupils having a picnic
7)对表原因的从句提问，常见的有because引导的从句，疑问词应用why。
Xiao Cheng didn't go to the farm with us because he was ill （划线提问）
_______ _____ Xiao Cheng go to the farm with us
8)对方式或程度等提出疑问，用疑问词How。
eg go by bike like very much
9)对数量提出疑问，疑问词为How many，要注意how many必须跟名词的复数形式。
eg two hundred sheep→How many sheep
10)对价格提出疑问，疑问词用How much。
eg I paid fifty yuan for the sweater
______ ______ did you pay for the sweater
11)对时间长度提出疑问，疑问词应用How long。
eg I've worked in that factory for two years （划线提问）96中考题
______ _____ _______ you worked in that factory
12)对时间频率，如 once a year, twice a week等提问，疑问词用How often。
13)对具体次数，如 once, twice, three times等提问，疑问词用How many times。
eg ______ did he call you the day before yesterdayTwice 96中考题
AWhat time BHow many times CHow much DHow long
14)对in＋一段时间提问，疑问词一般用How soon。
eg Jane and her brother will finish the work in two hours （划线提问）
_____ _____ _____ Jane and her brother finish the work
15)对距离提出疑问，疑问词用How far。
eg It's about two kilometres from here to the country（划线提问）
______ _____ _____ _____ from here to the country
16)另外，对日期、星期、天气等提出疑问，则分别用
What's the date
What day is it 如果是过去时间，就用was代替is。
What's the weather like
练习题
1)She does exercises at home in the evening（改成否定句、一般疑问句）
She ______ ______ exercises at home in the evening
______ she _____ exercises at home in the evening
2)He said something important at the meeting（改为否定句,一般疑问句）
He _____ ______ ______ important at the meeting
______ he ______ ______ important at the meeting
3)It'll take them three weeks to finish the work（划线提问）
______ ______ _______ it take them to finish the work
4)I have to wash all the plates and things after meals（划线提问）
_____ _____ you have to wash all the plates and things
5)The woman in the red coat is her mother（划线提问）
______ ______ is her mother
6)Li Ping spent twenty yuan on the dictionary（划线提问）
_____ ____ ____ Li Ping _____ on the dictionary
思考题
1)The worker's visited the factory already（改成否定句、一般疑问句）
The worker _____ _____ the factory ______
____ the worker ___ the factory __
2)Both of his parents are workers（改成否定句）
___ of his parents ______ a worker
3)He went to the park with his sister（划线提问）
_____ ____ ____ he go to the park
4)We really enjoyed working on the farm（划线提问）
What _____ you really enjoy ______
5)She writes to her parents once a week（划线提问）
_______ ______ ______ she write to her parents
6)Our PE teacher has been at this school since he came（划线提问）
______ ______ ______ our PE teacher been at this school
句型转换题是中考常见题型，它主要用来考查大家对句子结构的构成、变化的掌握及在行文中的运用等，类型繁多。现以近两年中考题为例，分类介绍如下：
[第一类] 改成否定句
英语中有关否定的结构各不相同，除动词部分构成的否定外，还有名词、代词的否定、部分否定、否定转移、以及一些表示否定意义的短语或句型等。
一、含有连系动词、情态动词等助动词的句子改为否定句时，在连系动词、情态动词等的后面加not就行了。如：（划线部分为正确答案，下同。）
1 He was late for school yesterday （2005黑龙江省泰州市）
He wasn’t late for school yesterday
2 The students of No2 Middle School have gone for a picnic already （2004新疆）
The students of No2 Middle School haven’t gone for a picnic yet
二、祈使句变否定句一般在其前加don’t。如：
3 Open the window （2005江苏省）
Don’t open the window
三、实义动词的否定式是在实义动词前加don’t, doesn’t, didn’t等。如：
4 She does the housework every day （2005黑龙江省哈尔滨市）
She doesn’t do the housework every day
5 He returned the book to the library this morning （2004重庆市）
He didn’t return the book to the library this morning
注意：变否定句时须注意某些词语的变化，如some改为any, something改为anything, already改为yet, both改为neither, all改为none等。又如：
6 Both of them are my best friends （2004甘肃省兰州市）
Neither of them is my best friend
[第二类] 改为疑问句
可分为一般疑问句、选择疑问句和反意疑问句。
一、变一般疑问句时，含有连系动词、情态动词的句子，只需将它们移至句首，第一个字母变为大写，句尾改为问号即可。含有实义动词的句子，在实义动词前加do, does, did等。变化过程中也要注意某些词语和人称的变化。如：
7 There’s something to eat in the cupboard（2005贵州省贵阳市）
Is there anything to eat in the cupboard？
8 Kate does morning exercises every day （2004山东省济南市）
Does Kate do morning exercises every day？
9 Ann returned the book to the library yesterday （2005四川省成都市）
Did Ann return the book to the library yesterday？
二、变选择疑问句时，如果该句是一般疑问句，则在后面直接加“or＋另一选择部分”就行了；若是陈述句，则要先变成一般疑问句。如：
10 John is an American （用a Canadian改为选择疑问句）（2004新疆）
Is John an American or a Canadian？
三、变反意疑问句时，要注意“前肯后否”和“前否后肯”，还要注意一些特殊形式的反意疑问句。如：
11 She has hardly had anything this morning, has she？（2005山东省泰安市）
12 You will meet your friends at the railway station, won’t you？（2004重庆）
13 She had nothing for breakfast, did she？（2005青海）
14 There was no time for the twins to go shopping, was there？（2004黑龙江省哈尔滨市）
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