小学英语句型转换的方法及练习题(完整版)资料.doc
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your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. 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 puzzles._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 student._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 classroom”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 long 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 120 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 you. 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)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' 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 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 _ (beautiful) 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。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.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。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 5÷x=3 2(x+1)=6 43-5x=23 (10-7.5)x=0.125×8 (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 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?