小学英语句型转换的方法及练习题(完整版)资料.doc

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1、小学英语句型转换的方法及练习题(完整版)资料(可以直接使用,可编辑 优秀版资料,欢迎下载)句型转换的方法一、 肯定句改否定句的方法一步法 1、 在be动词后加not。如:is not , are not , am not, was not, were not; 2、 在can, will等后加not。如:cannot, will not; 3、 上述都没有的,在动词前加助动词否定形式dont/doesnt/didnt。 4、 some 改成any。如有I、you将其该成you、I。二、 肯定句改一般疑问句的方法三步法 1、 把be动词放在句首,剩下的照抄,(some 改成any,my改成you

2、r等)句点改成问号。 2、 把can, will等放到句首,剩下的照抄,(some 改成any,my改成your等)句点改成问号。 3、 上述都没有的,在句首请助动词Do/Does/Did帮忙,剩下的照抄,(some 改成any,my改成your等)句点改成问号。(注 Does/Did后面的动词变回原形)三、 肯定句改特殊疑问句的方法四步法 1、在一般疑问句的基础上,句首添加一个疑问词即可,可根据划线部分确定是什么疑问词。 2、接着找be动词或can,shall, will等放在疑问词后面,若没有则请助动词do/does/did帮忙,写在疑问词后面,how many除外,必须先写物品,再写be

3、动词等。 3、划线部分去掉后剩下的内容照抄,(some 改成any,my改成your等) 4、句点改成问号。如: what (什么)how(怎样) who(谁) which(哪一个)why(为什么)where(哪里) how many(多少) how much (多少钱)what colour(什么颜色) how old(多大)等等 一、把be动词(am is are)和情态动词(can, may, 放到句首,其它照写。 遇I/weyou, myyour. someany. 句号变成问号(?)例如:陈述句: They are in the park. He can play the piano

4、. 一般疑问句: Are they in the park? Can he play the piano? 把下列句子变成一般疑问句1. I am singing._2. Mikes uncle is a fisherman._3. Sarah can do kung fu._4. They are in the factory._5. There are some businessmen in the house._6.She is a police officer._ _7.We are playing football._ _二、借助助动词do/does,第三人称单数用does,其余人称

5、用do,放到句首,其他照写。特别记住:前面用does,后面的动词一定还原成原形。遇I/weyou, myyour, someany. 句号变成问号(?)例如:陈述句: I like the ducks. He likes the dogs.一般疑问句:Do you like the ducks? Does he like the dogs?把下列句子改为一般疑问句。1. We want some Chinese food._2. They like making friends._3. Su Hai and Su Yang live on a farm._4.I often do word p

6、uzzles._5. They sing “In the classroom”together._6.We go hiking on Sundays._7. Tom likes reading stories. _8. Mr Wang is hungry. _9.The elephants ears are long _10. We like singing . _11Miss Yang is his mother ._12.I can sing and dance. _把下列句子变成否定句1.I am going to listen to music._2. Mike is a studen

7、t._3.Sarah can do kung fu._4. They are in the factory. _5. There are some flowers on the bed._6.This is my sister._7.We are playing football . _把下列句子改为否定句。1. We want some Chinese food ._2.They like making kites._3.Su Hai and Su Yang live on a farm ._4.I put a book on my head._5. They sing “In the cl

8、assroom”together._6.We play ping-pong on Sundays._7. Tom likes listening to music_1. Su Yangs football is on the table. 一般疑问句: _ ?对划线部分提问: _ ?2. I like oranges. 一般疑问句: _?肯定回答: _. 否定回答:_.3. They are my fathers robots. 一般疑问句:_?对划线部分提问:_?肯定回答:_.否定回答:_.4. I go home at 5:30.对划线部分提问:_?形容词比较级的用法 1、形容词比较级:在

9、英语中,两者进行比较,强调一方比另一方,可使用形容词比较级than 结构 2、需要掌握的形容词比较级的形式: tall, taller, short, shorter, old, older, young, younger, strong, stronger, heavy, heavier, long, longer, thin, thinner, big, bigger, small, smaller. 3语法归纳(形容词比较级) 一般情况 加er small-smaller 以e结尾的词 加r large-larger 以辅音字母+y结尾的词 变y为i,再加er easy-easier 以

10、一个辅音字母结尾的词 将这辅音字母双写再加er hothotter thin-thinner 形容词比较级的练习 I.Write the answers.(根据题意,写出答案。) 1.The black dog is _ (thin) than the white dog. 2.This balloon is _ (big) than yours. 3.My bag is _ (heavy) than yours. 4.John is _ (strong) than Mike. 5. I am _ (short) than Lucy. II.用所给词的正确形式填空,每词用一次。 Young l

11、ong tall heavy old thin 1.Monkeys tail is than the rabbits tail. 2.Dick is 11 years old. Nina is 12 years old. Dick is than Nina. 3.Im 140 cm . 4.Im 40 kg. Youre 42 kg. Im than you. 5.How are you? Im 45 kg. III.选择填空。 1. How heavy are you? _. A. Im 48 years old. B. Im 48 kg. C. Im 48 cm. 2. Tom is 12

12、0 cm. Jack is _. Than him. A. tall B. taller C. heavier 3. How heavy is the whale? _. A. Its strong. B. Its heavier. C. Its 3600 kg. 4. How _ are you? A. old B. older C. taller 5. The monkey has a _ tail. A. tall B. long C. longer 6. How big are your feet? _ . A. I wear Size 17. B. Im bigger than yo

13、u. C. Im 17 bigger. 7. Jim is 40 kg. Tom is 38 kg. Tom is _ than Jim. A. taller B. thinner C. heavier 8. Im 11 years old. My sister is 2 years older than me. She is _. 9. I am _ than my aunt. A. strong B. big C. shorter 10. My father is _ than my grandpa. A. older B. younger C. smaller IV.选出形容词的比较级形

14、式 Tall - strong - old- thin - heavy - big - V.连词成句。 1. your, is, big, room how _ 2. Im, than, taller, 6 cm, you _ 3. my pencil, longer, yours, is, than _ 4Tall, 21, I,,am, meters _ (一) 写出下列形容词与副词的比较级与最高级形式:long_ _ wide _ _ fat _ _heavy_ _ slow _ _ few_ _bright_ _ badly _ _ far_ _many_ _ happy_ _ (二)

15、用所给词的正确形式填空:1. Bob is _ ( young ) than Fred but _ (tall) than Fred. 2. Yingtian is not as _ (tall) as Yongxian. 3. Almost all the students faces are the same but Li Deming looks _ (fat) than before after the summer holidays. 4.Which is _ (heavy), a hen or a chicken? 5.- How _ (tall) is Sally? - She

16、s 1.55 metres _ (tall). What about Xiaoling? -She s only 1.40 metres _ (tall). She is much _ (short) than Sally. She is also the _ (short) girl in the class. 6. He is _ (bad) at learning maths. He is much _ (bad) at Chinese and he is the _ (bad) at English. 7. Annie says Sally is the _ (kind) person

17、 in the world. 8. He is one of the_(friendly) people in the class, I think.9. A dictionary is much _ (expensive) than a story-book.10. An orange is a little _ (big) than an apple, but much _ (small) than a watermelon.11. The Changjiang River is the _ (long) river in China.12. Sue is a little _ (beau

18、tiful) than her sister.13. My room is not as _ (big) as my brother s.14.-How difficult is physics? -I m not sure. - Is it _ (difficult) than maths? - I don t think so.15.- Annie plays the piano very _ (well). - Sue plays it _ (well) than Annie. And Sally plays it the _ (well).解方程知识回顾:1、 含有未知数的等式叫做方程

19、。2、 使方程左右两边相等的未知数的值,叫做方程的解。3、 求方程的解的过程叫做解方程。4、等式的基本性质等式两边加上或减去同一个数或式子,左右两边仍然相等等式两边乘或除以同一个不为0的数或式子,左右两边仍然相等本次课我们要解决稍复杂的方程,比如方程两边都含有未知数,如;等号两边都是分数形式的方程,如。解方程中需要掌握的一般方法:一、利用等式的基本性质简化方程: 等式两边加上或减去同一个数或式子,左右两边仍然相等 等式两边乘或除以同一个不为0的数或式子,左右两边仍然相等二、合并含未知数的式子:根据乘法分配律三、去括号:乘法分配律;括号前面是减号,去掉括号要改号;括号前面是加号,去掉括号不改号.

20、四、两边是分数形式的方程,运用交叉相乘法,转化为不是分数形式的方程。五、解方程步骤要规范,求出得数后可以检验。解方程实际上就是利用等式的性质将等式一步一步变形,最后变成x= 的形式,就求出了未知数的值,即方程的解。解方程的一般步骤:(1)去括号;(2)整理不含未知数的数:利用等式的基本性质消去等号一边的数(3)如果等号左右两边都出现含未知数x的式子,则要利用等式的基本性质把等号一边的x消掉;(4)合并含未知数x的式子;(5)使含未知数x的式子出现在等号的一边,不含未知数的数出现在等号的另一边;(6)等号左右两边同除以未知数x前的乘数;补充:【把一个式子从等号的一边移到另一边,要改变式子的符号。

21、一般情况下,把含有未知数的式子移到等号的右边,把其他数移到等号的右边。(4x=3x+50=4x-3x=50;5+2x=7=2x=7-5)】一、利用等式的基本性质:20-x=9 5x=3 2(x+1)=6 43-5x=23 (10-7.5)x=0.1258 (5x-12) 8=24 (3x-101)2=8二、根据乘法分配律,合并含未知数的式子:当出现多个含未知数的式子时,我们要利用乘法分配律,将含有未知数的式子合并2.4x+x=5.1 x-0.76x=4.8 7-0.5x+7x=20 17+5x-9x=7等号左右两边都出现含未知数x的式子,则要利用等式的基本性质把等号一边的x消掉5x=50+4x

22、 8-2x=9-4x 9x-400=6x+200 三、去括号:乘法分配律; 括号前面是减号,去掉括号要改号;括号前面是加号,去掉括号不改号. 在方程中,如果出现除号,只要把方程两边同乘以除数5(x+1)=2 四、两边是分数形式的方程,运用交叉相乘法,转化为不是分数形式的方程。(1) (2) (3) (4) 综合练习 设未知数解方程(1)审题:分析题意,分析题中的数量关系,找出等量关系(2)设未知数,一般用字母x表示(3)解方程 1. 爷爷与小明的年龄和为82岁,爷爷的年龄比小明年龄的5倍还大4岁。小明今年几岁?2. 北京和上海相距1320km。甲乙两列直快火车同时从北京和上海相对开出,6小时后两车相遇,甲车每小时行120千米,乙车每小时行多少千米? 3. 李爷爷家养羊284只,其中大羊的只数是小羊只数的3倍。大羊和小羊各有多少只?4. 乙两艘轮船同时从上海出发开往青岛,经过18小时后,甲船落在乙船后面57.6千米,甲船每小时行32.5千米,乙船每小时行多少千米?5. 甲乙两个同学有书若干,已知甲同学的书比乙同学多12本,若乙同学给甲6本书,这时甲同学的书就是乙同学书的1.5倍,问甲、乙同学原来各有多少本书?

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