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(yǔ)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(wèn)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(yǔ)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(yǔ)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(yǔ)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(yǔ)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(yǔ)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(yǔ)的形容詞后面加不定式可以將某些含有狀語(yǔ)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.