5.They knew something about it only after you told them.

　They knew______ about it _____ you told them.

4.My parents left home three days ago.

　They have not come back yet.

　My parents____ from home for three days.

3.People plant many young trees on both sides of the street each year.

　Many young trees are ____ on ____ sides of the street each year.

2. Can you show me the way to the post office?

　Can you tell me _____ get to the post office?

　同义型句型转换即是用另一种方式来表述与原句相同的句意，也称作同义句转换，主要考查学生对句型及词汇的掌握情况。

　[真题引导1]

　I prefer walking there to going by bus.

　I prefer to walk there ___ by bus.

　[答案与解析]

　该题考查prefer...to...与prefer...rather than...这两个句型的转换。前者后接动词时用V.+ing形式，而后者则接不定式，并且rather than后的不定式符号要省略。答案：rather than go。

　[真题引导2]

　It took Mary two weeks to prepare for the exam.

　Mary ____ two weeks ___ for the exam.

　[答案与解析]

　该题考查的是表示“花费时间做某事”的两个句型的转换，take常用的句型是：it takes +时间 + to do...；而spend却是：sb +spend + 时间 + (in)doing...。答案：spent， in preparing。

　[真题引导3]

　I always get up before six o'clock in my school days.

　I __ get up ______ six o'clock in my school days.

　[答案与解析]

　根据原句的意思，只有在第二句的两个空白处分别填入never与after，这样才能表达出与第一句相同的含义。这里要注意always的否定副词是never。答案：never，after。

　[真题引导4]

　The children are too tired to walk farther.

　They are_____ tired ____they ____ walk farther.

　[答案与解析]

　含有too...to的简单句常和so...that 引导的复合句互相转换。但是too...to的本身是否定意义，so...that从句要改为否定。答案：so, that, can't。

　[真题引导5]

　The girl left her home a few days ago, she has not come back yet.

　The girl has____ from her home for a few days.

　[答案与解析]

　第一句意思为“女孩几天前离开家，她现在还未回来”。根据句意可知应用现在完成时。for a few days表示一段时间，在完成时中只能与延续性动词搭配，而leave是非延续性动词。答案：been away。

　[巩固训练]

1. They say that Mr. Liu can speak German.

　_____ that Mr. Liu can speak German.

就划线部分提问，是用一个合适的疑问词去替代句中的某一成分，使之成为一个特殊问句。其方法主要是：先依据语意选择相应的疑问词和疑问句语序，句末改用问号。这时我们要注意以下几点：

(1)选择恰当的疑问词。

(2)对主语或主语的定语提问时，用陈述句语序。对定语提问时，所修饰的名词应放在疑问词后。

(3)对其它成分提问，用“疑问词+一般疑问句”语序。如：

My grandpa has been in Shanxi for ten years.

→Who has been in Shanxi for ten years?

Lily’s dog has lost.

→Whose dog has lost?

Emma bought one dictionary yesterday.

→How many dictionaries did Emma buy yesterday?

句型转换设题广，部分试题难度较大，这就要求同学们有扎实的语言基本功和熟练的解题技巧。

对于按要求改写句子的试题：首先应注意“要求”的内容；二是要注意选词的准确；三是要注意各种句型的特殊点；四是要注意大小写和拼写的正确。如：

1. The maths problem is too difficult for him to work out. (改为复合句)

The maths problem is ______ difficult _____ he can’t work it out.

2. The surfers both won first prize in the city surfing competition. (改为否定句)

_____ ______ the surfers won first prize in the city surfing competition.

3. I think the fastest way to travel is by plane. (改为特殊疑问句)

____ do you think the fastest way to travel ______?

4. Miss Li showed us a picture of the feathered dinosaur. (改为被动语态)

We _____ ______ a picture of the feathered dinosaur by Miss Li.

答案与简析：

1. too…to…(太……而不能……)＝so …that …not (如此……以致……不……)，所以，应该填so, that。

2. 从转换后的句式中没有明确的否定词not可知不能用助动词加not的形式来完成。再根据both的反义词是neither，主语又是the surfers，因此应填Neither of。

3. 本题实际上是对“by plane”提问，改换后的句子只是缺少了“is by plane”，因此，该将“by plane”改为“what”，后一个空用“is”。

4. 由showed确定要用一般过去时的被动语态，故填were shown / showed。

The film is very interesting.

→How interesting the film is!

It”s a beautiful flower.

→What a beautiful flower it is!

一般情况下，what引导的感叹句和how引导的感叹句可相互转换。如：

How nice the watch is! →What a nice watch it is!

3. 反意疑问句。

Mary doesn’t work hard.

→Mary doesn’t work hard, does she?

注意：Let’s和Let us祈使句的附加问句分别为shall we 和will you。如：

Let”s go out for a walk, shall we?

2. 特殊疑问句。

I got there the day before yesterday.

→When did you get there?

1. 一般疑问句。

Sam often does his homework in the evening.

→Does Sam do his homework in the evening?