ⅰ.题型介绍。
所谓“句型转换”就是先给一个完整的句子a，再根据括号内的要求(有时没有明确，须自己观察)，在第二个句子b的空白处填上适当的词来完成的句型转换。
.题型分类。
从形式上看，有如下几种形式：①某一词或词组的转换；②词组与句子的转换；③同义句型的转换；④为纠正常犯语言错误而设计的题目。
从内容上看，此题型涉及的面较广，主要有：①句子功能方面的转换。包括陈述句(肯定与否定)、四种题疑问句、祈使句、感叹句的转换；②句子结构方面的转换。
即简单句、复合句、并列句之间的转换；③语态的转换。即主动语态与被动语态之间的转换；④常用句型与词汇手段的转换。
.具体分类如下。
一、陈述句与疑问句、祈使句、感叹句间的转换。
1、陈述句中肯定句变为否定句，大部分是用not来改变谓语结构，但也有借用否定意义的词，如nothing, nobody, none, neither, little, few,never, hardly等，例如：：
a：tom does well in maths.
b：tom doesn't do in maths.
a：he has much to do.
b：he has nothing to do.
a：all of my classmates like art.
b：none of my classmates likes art.
2、改为疑问句。根据上下句的结构和词的减少，来判断变为哪一种形式的疑问句。例如：
a：my brother often has breakfast at school.
b：does your brother often h**e breakfast at school?
a：tom's already weak in english.
b：tom's already weak in english, isn't he ?
a：the red light changes every two minutes.
b：how often does the red light change?
3、改为感叹句。根据所给的句子结构和单词的词性，来确定使用哪一种感叹句的形式，例如：
a：this is an interesting book.
b：what an interesting book this is!
或how interesting this book is!
二、同义句转换。
根据上句，写出一个意思相同(或相近)的下句，此类形式繁多，内容复杂，涉及面广，归类如下：
1、同义词或词组之间的转换。(通常上下句时态保持一致)。
常见的同义词或词组有：(1)四个“花费”(spend-take-cost-take);(2)三个“到达”(get to-reach-arrive in/at);(3)四个“收到…来信”(hear from-get a letter from-receive a letter from-h**e a letter from);(4)两个“擅长于…”(be good at-do well in);(5)两个“有空”(be free-h**e time);(6)三个“入睡”(go to sleep-get to sleep-fall asleep);(7)两个“玩得开心”(enjoy oneself-h**e a good time);(8)“给…打**”(call sb-telephonesb-ring sb. a call-makea telephone to sb.
)(9)“飞往…”(fly to…-goto…by air/plane)(10)“自学”(teach oneself-learn…by oneself)(11)在…方面帮助help…with…-help… (to)do…(12)在…差be weak in…-do badlyin…(13)能/会…can-be able to(14)更喜欢…like…better than…-prefer…to…(15)充满了…be full of…-be filled with…(16)放弃干…give updoing…-stop doing…(17)不再… no longer-not …any longer(18)照顾/保管。
take care of…-look after(19)展览on show-on display(20)阻止…干…stop…from doing-keep/prevent…from doing…(21)由于thanks to-because of…(22)举手hands up-put up one's hands(23)最后，终于at last-inthe end(24)与…不同。
be different from…-be not the same as…(25)从…借入… borrow…from…-lend…to…(26)乘公汽/火车/的士。
go to…bybus/train/taxi-take a bus /train/taxi to…(27)乘自行车去… go to…bybike-ride a bike to…(28)为…感到自豪。
be proud of…-be the pride of…(29)步行去… walk to…-go to…on foot (30)独自地by oneself -alone等。例如：
a：the children had a good time in the park.
b：the children enjoyed themselves in the park.
2、同义句型之间的转化。常见的同义句型有①it seems that 从句→somebody seems(to be)+adj/n ②it's kind of sb. to do…→somebody iskind to do… ③what does…mean?
→what do you mean by…? 或what's themeaning of…?④there is something wrong with…→something is wrongwith… ⑤not…until…与when/after/before引导的时间状语从句的转换。
what's wrong with…?→what's the matter with…? howis…?
→what's…like…?⑧how do you like…?→what do you think of?
⑧it'stime that…→it's time for sb. to do…⑨it's said that…→people saythat…⑩can i help you? →what can i do for you?
例如：a：i went to bed after i finished my homework.
b：i didn't go to bed until i finished my homework.
3、if引导的条件状语从句的转化。例如：
a：if it doesn't rain tomorrow, they'll go to the park.
b：unless it rains tomorrow, they'll go to the park.
a：if you don't hurry, you'll be late.
b：hurry up, or you'll be late.
a：fish can't live if there is no water.
b：fish can't live without water.
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