of在英语中是一个常用的介词，表示在……的，在……之前等；它也可以作为助动词；可表示同为，表主格关系并且在英语中有大量的词组使用of。
1、(表示时间)在…的,在…之前; 在…期间
What do you do of a Saturday?星期六你干什么?
2、(表示方式)根据
She did it of her own will.她是自愿这么做的。
3、(表示对象)对于,就…而言
He felt quite certain of success.他对成功很有把握。
4、(表示原因)由于,因为
5、(表示方位)在; 位于
New York is east of Washington.纽约在华盛顿以东。
6、(表示范围）在…之中
7、(表示结果）在…方面
8、(表示目的)用于…的
9、(表示否定)缺乏,没有
They were destitute of necessaries of life.他们缺少生活必需品。
10、of接直接宾语
-告诉-tell sb. of sth. inform sb. of sth warn sb. of fire
remind sb. of his duties acquaint sb. of sth. notify of..
11、of接间接宾语
request sth. of sb. expect sth. of sb. require sth. of sb.
ask a question of sb. be fearful of mistakes be jealous of wealthy persons
12、of表示人物的特性，籍贯，特性或出生等
He is of Irish descend.
13、固定词组
-say of,tale of,hear of,think of,learn of,savor of
The room smells of stale cabbage.
-be sure of be suspicious of be aware of
be confident of be proud of be ashamed of
be afraid of be capable of be lack of
be critical of be shortly of be conscious of
be ignorant of be wary of be cautious of
be appreciative of your advice