介詞是虛詞，介詞不能單獨作句子成分，只能用在名詞、代詞或作用相當于名詞的其他詞、詞組或從句之前，與之一起構成介詞短語充當句子成分。

名師介紹：周涵，職稱英語考試輔導專家，職業(yè)培訓教育網職稱英語網絡輔導老師，曾在多家知名培訓機構及人事考試中心主講職稱英語考試輔導課程；參與編寫大量職稱英語考試輔導教材；諳熟職稱英語的命題規(guī)律和教材精髓，針對考試的六大題型總結出一套適合成人特點、簡單易學的快速提分應試技巧，使眾多學子順利通過考試。

周涵　2014年職稱英語考試介紹及課程特色介紹　 免費試聽 購買

Ⅰ.介詞的種類

(1)簡單介詞

on，in，with，by，for，about等

(2)合成介詞

into，out of，as for，without

(3)短語介詞

by means of，because of，according to，in respect of，in contrast with，in spite of

(4)分詞介詞

including，concerning，considering，regarding，provided，given

Ⅱ.介詞短語

介詞短語是由介詞和構成介詞短語的那部分名詞或相當于名詞的其他詞或短語構成的。本文|由職業(yè)培訓教育網獨家整理。主要有下列幾種：

(1)介詞+名詞

Aluminum and zinc can easily combine with the oxygen in the air.

(2)介詞+代詞

How much luggage can I take with me?

(3)介詞+動名詞

You learn to speak English by speaking it.

(4)介詞+數詞

Everything divides into two.

(5)介詞+另一個介詞短語

The air was removed from between the two pipes.

(6)介詞+形容詞或副詞

It is far from satisfactory.

We have made some progress，but it is far from enough.

The door suddenly opened from within.

(7)介詞十不定式

The airplane is about to take off.

(8)介詞十分詞

I consider the problem as settled.

(9)介詞+從句

Liquids are different from solids in that liquids have no definite shape.

Ⅲ.介詞的用法

(1)作狀語

According to molecular theory，all matter is made up of small particles called molecules.

(2)作定語

These are movies and videotapes in foreign languages.

Claims beyond the responsibilities of the suppliers can not be entertained.

(3)作表語

The result is beyond expectation.

(4)作主補和賓補

Petroleum is considered of great value.

A force may set the ball in motion.