所谓句型转换，就是首先给一个完整的句子 A，然后按照括号中的要求(有时不清楚，请自己看)，在第二个句子 B的空白处填上合适的词，这样做。
在陈述句中，肯定句变成否定句，大多数情况下是使用 not来改变谓语结构，但是也有一些借用否定词，比如 nothing, nobody, neither, little, few, never, hardly等等，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.
A：My brother often has breakfast at school.
B： Does your brother often have 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?
A：This is an interesting book.
B：What an interesting book this is!
或 How interesting this book is!
常见的同义词或词组有:(1)四个“花费”(spend-take-cost-take);(2)三个“到达”(getto-reach-arrivein/at);(3)四个“收到…来信”(hearfrom-get a letterfrom-receive a letterfrom-have a letterfrom);(4)两个“擅长于…”(be good at-do wellin);(5)两个“有空”(befree-havetime);(6)三个“入睡”(go tosleep-get tosleep-fallasleep);(7)两个“玩得开心”(enjoyoneself-have a goodtime);(8)“给…打电话”(callsb-telephonesb-ringsb. acall-make a telephone tosb.)(9)“飞往…”(flyto…-goto…byair/plane)(10)“自学”(teachoneself-learn…byoneself)(11)在…方面帮助help…with…-help…(to)do…(12)在…差be weakin…-do badlyin…(13)能/会…can-be ableto (14)更喜欢…like…betterthan…-prefer…to…(15)充满了…be fullof…-be filledwith…(16)放弃干…give updoing…-stopdoing…(17)不再… nolonger-not…anylonger (18)照顾/保管 take careof…-lookafter (19)展览 onshow-ondisplay (20)阻止…干…stop…fromdoing-keep/prevent…fromdoing…(21)由于 thanksto-becauseof…(22)举手handsup-put upone'shands (23)最后,终于atlast-in theend (24)与…不同 be differentfrom…-be not the sameas…(25)从…借入…borrow…from…-lend…to…(26)乘公汽/火车/的士 goto…bybus/train/taxi-take a bus/train/taxito…(27)乘自行车去… goto…bybike-ride a biketo…(28)为…感到自豪 be proudof…-be the prideof…(29)步行去… walkto…-goto…on foot (30)独自地by oneself-alone等。例如:比如：火龙果智能语法检测
A：The children had a good time in the park.
B：The children enjoyed themselves in the park.
同义句型间的相互转换。一般同义句型如下：① It seems that从句→ Somebody seems (to be)+ adj/n②It's kind of sb. to do…→ Somebody is kind to do…③ what does…？瓦特多约姆.梅南比…？还是说，' sthemeaning of…？④ There is something wrong with…→ Something is wrong with…⑤ not… until….用 when/after/before引导时的时间状语从句转换⑥what's wrong with？“What's thematter. with”？⑦ How is…？→沃特…利克…？⑧ How do you like…？“What do you think”？⑦It's time that…→It's time for sb. to do…⑦It's said that…⑦ People say that…⑦ Can I help you？what can I do还是 you？
A：I went to bed after I finished my homework.
B：I didn't go to bed until I finished my homework.
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.
现在完成式中的一句多译法结束式动词不能与现在完成式的时间段连用，必须改为相应的延续式动词。常用动词转换为：buy-have、borrow-keep、die-be dead、open-be open、join-be in+组织/be a+成员、begin-be on、leave-be away from、close-be closed、 arrive in/get to/come/goto-be in/at、finsh-be over、 go tosleep-be asleep、 getup-be asleep.
例如：The old man died five months ago.
The old man has been dead since five months ago.
The old man has been dead for five months.
It's five months since the old man died.
Five months has passed since the old man died.
A：I saw they were playing football on the playground.
B：I saw them playing football on the playground.
A：The teacher found that she was very clever.
B：The teacher found her very clever.
A：He found that it was hard to learn English well.
B：He found it hard to learn English well.
A：We are sure that we will win to first match.
B：We are sure to win to first match.
A：Could you tell me how I can get to the railway station?
B：Could you tell me how to get to the railway station?
A：We don't know what we should do next.
B：We don't know what to do next.
2.可以将由 when/after/before/while/since/until引导的语句转换为 when/after/before/while/sine/until+ doing…
A：They went home after they finished their work.
B：The went home after finishing their work.
A：Mr Smith has taught English since he came to China.
B：Mr Smith has taught English since coming to China.
when sb.+ be+ communications+ years old→ at the age of+岁数
A：When he was twelve years old, Edison started writing his own newspaper.
B：At the age of twelve, Edison started writing his own newspaper.
③结果状语由 so… that…引导可以转换成 too… to do或… enough to do…
A：The box is so heavy that I can't carry it.
B：The box is too heavy for me to carry.火龙果智能语法检测
或：The box isn't light enough for me to carry.
A：The child is so old that he can go to school.
B：The child is old enough to go to school.
④通过 so that引导的目的状语从句可以转换为 in order to do，例如：
A：My father got up early this morning so that he could catch the early bus.
B：My father got up early this morning in order to catch the early bus.
⑤由 because引导的原因状语从句可以转换为 because of…例如：
A：We didn't go to the park because it rained.
B：We didn't go to the park because of the rain.
A：The man who is on the bike is Jim.火龙果智能语法检测
B：The man on the bike is Jim.
A：The man who is driving the red car is my boss.
B：The man driving the red car is my boss.
A：The girl who is called Mary is my sister.
B：The girl called Mary is my sister.