Of Possession
表示拥有
Of is mainly used as a possessive. For example,
of主要作为所有格来用。比如：
Hes a friend of mine.
他是我的朋友。
The color of the house is red.
这个房屋是红色的。
It is important to remember that it is more common to use the possessive s or the possessive adjective in English, than to use of | even if of is grammatically correct.
记住，比起用of，英语中更常用s或所有格形容词，即便of在语法上也说得通。
Thus, the sentences above would generally be in these forms:
所以，以上的句子一般都以如此的形式出现：
Hes my friend.
他是我的朋友。
The houses color is red.
这个房屋是红色的。
Common Phrases with Of | All of / Both of
关于of的容易见到短语All of / Both of
Of is also commonly used with all and both to describe a common trait that many objects share. For example,
of也可以和all和both连用，用来表示很多事物的一同点，比如：
All of the students in the class enjoy volleyball.
班上所有些同学都爱排球。
Both of the assignments are due at the end of the week.
这两项任务的截止日期都是在周末。
Common Phrases with Of | One of the most ...
关于of的常用短语One of the most ...
Another common phrase with of is one of the + superlative form + plural noun + singular verb. This phrase is commonly used to focus on a specific object that stands our from a group. Notice that although the plural noun is used, the singular phrase takes the singular conjugation of the verb because the subject is One of the .... For example,
还有一个关于of的容易见到短语，就是one of +最高级形式+名词复数+动词单数。该短语常用来表示某个具体的事物在集体中很引人注目。注意，虽然短语中的名词是复数形式，但动词用的是单数形式。由于主语是One of the比如：
One of the most interesting things about my job is the people I meet.
我的工作最有趣的地方之一就是我所见到的人。
One of the most difficult subjects for me is math.
对于我来讲，最难的学科之一就是数学。
From Origins
表示来源
From is generally used to express that something originates from something else, that something comes from somewhere, or some person. For example,
From常被用来表示某事物源自另一事物，某物来自某地或某人。比如：
Jack comes from Portland.
杰克来自波兰。
This formula derives from the work of Peter Schimmel.
这个公式是皮特舒密尔开创的。
This pearl comes from the South Pacific.
这颗珍珠来自南太平洋。
From | To / From | Until
From can also be used with the prepositions to and until to mark the beginning and ending point of time of an action or state. Generally, from ... to is used with past tenses, while from ... until is used when speaking about future actions. However, from ... to can be used in most situations. For example,
From也可以和介词to和until连用，用来表示某个动作或状况的起止时间。通常来讲，fromto和过去时态连用，而fromuntil则是表达以后的动作。但，fromto适用于绝大多种情形，比如：
I played tennis from two until four in the afternoon yesterday.
昨天下午两点到四点，我都在打网球。
We are meeting in Chicago from Monday until Thursday.
从周一到周四，大家都在芝加哥开会。
