1、第一种，定冠词和不定冠词之间的使用。I need a book to read on my trip.I have finished the book that you lent me.
3、第二种，定冠词和零冠词之间的区别。例句：History is my favourite subject.The history of china is my favourite subject.
5、第三种，零冠词和不定冠词间的区别。例句：Beauty is in the eye of the beholder.情人眼里出西施。She is a beauty.
