一．用“及物動(dòng)詞+不定式”結(jié)構(gòu)可以將含有that引導(dǎo)的某些賓語從句的復(fù)合句轉(zhuǎn)換成簡(jiǎn)單句.例如：
1.He decided that he would buy a digital camera online.→He decided to buy a digital camera online.
2.We hoped that we would come back soon.→We hoped to come back soon.
3.I expect that I shall finish my work by this Sunday.→I expect to finish my work by this Sunday.
二．用“疑問詞+不定式“結(jié)構(gòu)可以將某些含有連接代詞或連接副詞引導(dǎo)的賓語從句轉(zhuǎn)換簡(jiǎn)單句.例如：
1.I don’t know which one I can buy .→I don’t know which one to buy.
2.We wonder where we’ll go this Sunday.→We wonder where to go this Sunday.
3.Could you please teach me how I can search the Internet?→Could you please teach me how to search the Internet?
三．用“too…to…”結(jié)構(gòu)可以將含有so…that引導(dǎo)的結(jié)果語從句(否定)的復(fù)合句轉(zhuǎn)成簡(jiǎn)單句.如：
1.The boy is so young that he can’t look after himself.→The boy is too young to look after himself.
2.The question is so difficult that I can’t answer it .→The question is too difficult for me to answer.
四．用“…enough +不定式”結(jié)構(gòu)可以將含有so …that …引導(dǎo)的結(jié)果狀語從句（肯定）的復(fù)合句轉(zhuǎn)變?yōu)楹?jiǎn)單句.例如：
1.The girl is so tall that she can reach the apples on the tree.→The girl is tall enough to reach the apples on the tree.
2.This hall is so large that it can hold 2000 people.→This hall is large enough to hold 2000 people.
3.The table was so light that the little boy can carry it.→The table was light enough for the little boy to carry.
五．用“happen + 不定式”或“seem +不定式”結(jié)構(gòu)可以分別將“It happens that…”和“It seems that… ”等含有主語從句的復(fù)合句轉(zhuǎn)換為簡(jiǎn)單句.例如：
1.It happened that the teacher saw him playing in class.→The teacher happened to see him playing in class.
2.It seemed that sharks have been on the earth for thousands of years .→Sharks seemed to have been on the earth for thousands of years.
3.It seemed that this camera offered the most at the best price.→This camera seemed to offer the most at the best price.
六．用“in order +不定式”或“so as +不定式”結(jié)構(gòu)可以將含有so that 引導(dǎo)的目的狀語從句的復(fù)合句轉(zhuǎn)換為簡(jiǎn)單句.如：
1.She decided to buy a camera online so that she could receive it soon.→She decided to buy a camera online in order to receive it soon.
→She decided to buy a camera online so as to receive it soon.
2.I went over my composition again and again so that I couldn’t make any mistakes.→I went over my composition again and again in order not to make any mistakes.
→I went over my composition again and again so as not to make any mistakes.
3.Miyoko bought a camera so that she could take pictures in Beijing.→Miyoko bought a camera in order to take pictures in Beijing.
→Miyoko bought a camera so as to take pictures in Beijing.
七．在某些作表語的形容詞后面加不定式可以將某些含有狀語從句的復(fù)合句轉(zhuǎn)變成簡(jiǎn)單句.例如：
1.I was glad when I heard the good news .→I was glad to hear the good news.
2.Tom’s parents were very surprised as they knew all about it.→Tom’s parents were very surprised to know all about it.