He will share his professionalknowledgeofhaircare.
a story of adventure
I like reading books about farm animals.
Theresbeenalotinthepapersabouttheproblemsfacingstepchildren.
Mr. Chen will give us a talk on the history of England.
on和about还挺好区别的。但of和about的区别感觉非常难。
譬如：
a storyofadventure
I like reading booksaboutfarm animals.
为何不可以是 a story about adventure
或者knowledgeofhaircare 为何不可以是knowledge abouthaircare.
1. He will share his professional knowledge of haircare.
【答】knowledge 和 haircare，是“动宾关系”。knowledge of haircare：对头发护理的常识（= 了解如何护理头发）。
of介词短语表示“动宾关系”解说：
被修饰的名词跟of 介词短语存在动宾关系。被of介词短语修饰的名词具备动词性质（一般是由动词变来的名词），该名词与of后面的名词，存在动宾关系。
It is a waste of time arguing about such trifles. 辩论如此的小事是费时。
This girl gave a vivid description of the event. 那女生对这件事作了一番生动的描述。
There is no short cut in the study of a foreign language. 在外语学习中没捷径可走。
2. a story of adventure
【答】of + 抽象名词， 作定语表示被修饰名词具备“...性质”，属“描述性定语”。
a story of adventure：冒险故事（说明故事具备“冒险性质”）。又如：
a man of ability：有才能的人；能干的人
something of value： 有价值的东西
3. I like reading books about farm animals.
【答】about 表示“涉及”关系，等于concerning。与on 同义，后者较合法。例子略。
4. Theres been a lot in the papers about the problems facing stepchildren.
【答】同3。
5. Mr. Chen will give us a talk on the history of England.
【答】同3。on 较about 更正式。
