With是个代词，基本的意思是“用”，但它还可以帮助组成一个极其多采多姿的句式，在语句中起二种功效；介词与修饰词。

with在下述构造中起介词功效：

1.“with 宾语 现在分词或语句”，如：

(1) This article deals with common social ills, with particular attention being paid to vandalism.

2.“with 宾语 过去分词或语句”，如：

(2) With different techniques used, different results can be obtained.

(3) The TV mechanic entered the factory with tools carried in both hands.

3.“with 宾语 修饰词或语句”，如：

(4) With so much water vapour present in the room, some iron-made utensils have become rusty easily.

(5) Every night, Helen sleeps with all the windows open.

4.“with 宾语＋介词短语”，如：

(6) With the school badge on his shirt, he looks all the more serious.

(7) With the security guard near the gate no bad character could do any thing illegal.

5.“with 宾语＋介词虚词的用法”，如：

(8) You cannot leave the machine there with electric power on.

(9) How can you lock the door with your guests in?

上边五种“with”构造的介词作用，非常广泛，尤其是在科技英语中。

然后谈“with”构造的修饰词作用，有下述五种：

一、“with 宾语 现在分词或语句”，如：

(10) The body with a constant force acting on it. moves at constant pace.

(11) Can you see the huge box with a long handle attaching to it ?

二、“with 宾语 过去分词或语句”

(12) Throw away the container with its cover sealed.

(13) Atoms with the outer layer filled with electrons do not form compounds.

三、“with 宾语 修饰词或语句”，如：

(14) Put the documents in the filing container with all the drawers open.

四、“with 宾语 介词短语”，如：

(15) The young lady with a red ribbon on her head is my former maths teacher.

(16) Do you know the gentleman with both hands in his pockets?

五、“with 宾语 介词虚词的用法，”如：

(17) Is there any water in the kettle with this cover off ?

(18) Out went the boy scouts with their uniforms on.