1）介詞與先行詞的習(xí)慣搭配
There is no way in which it could be brought back to the earth．（in與way是習(xí)慣搭配）
2）介詞與定語(yǔ)從句中的動(dòng)詞,形容詞的習(xí)慣搭配
These are the wires with which different machines are connected．（be connected with是習(xí)慣搭配）
The author with whom all of us are familiar will visit our compa-ny．（be familiar with是習(xí)慣搭配）
3）同形的先行詞,或定語(yǔ)從句中的動(dòng)詞,形容詞表示不同的含義時(shí),要根據(jù)其含義選用不同的介詞.
I can't remember the age at which he won the prize．
That is the age in which people live in peace and happiness．
age在前句中意為“年歲”,與at搭配；在后句中意為“時(shí)期”,與 in搭配.
4）復(fù)雜介詞須保持其完整形式,常見(jiàn)的復(fù)雜介詞有on the top of,in the middle of,in front of,in spite of,at the back of,because of等.
We took a photo of rocket,the length of which was about 30me- tres．
Sound is a tool by means of which people communicate with each other．
They marched through the square,in the middle of which stood a monument．
5）短語(yǔ)動(dòng)詞中的介詞不可與動(dòng)詞分開(kāi)提至關(guān)系代詞前.常見(jiàn)的短語(yǔ)動(dòng)詞有l(wèi)isten to,look at,depend on,pay attention to,take care of,look into,break into,get rid of,take part in,make use of,take hold of,catch hold of,catch up with,get along with,look forward to等.此時(shí)可用which,who,whom或that,也可將他們省略.
（誤）This is the girl of whom he will take care．
（正）This is the girl whom he will take careof．
6）當(dāng)介詞與定語(yǔ)從句中的動(dòng)詞或形容詞聯(lián)系緊密（但不是短語(yǔ)動(dòng)詞）時(shí),介詞也可放在動(dòng)詞或形容詞的后面.但當(dāng)介詞與從句中的動(dòng)詞或形容詞聯(lián)系不緊密時(shí),則需將介詞置于關(guān)系代詞前.比較：
The space station which we drove to was in the desert．
I'll never forget the day in which I joined the Party．