Article is a type of determiner.
Article include two types: Indefinite article: a/an and definite article: the
1.Indefinite article means ‘one’, but ‘one’ emphasize the number, ‘a/an’ emphasize ‘anyone’.
2.Plural(eg. men) can NOT use “a/an”.
3.The following circumstances can NOT use Indefinite article:
1.A word doesn’t have Plural form, such as Substance(eg. water) and Abstract(eg. honest) can NOT too.
2.Name and place can NOT use too.
4.When a/an used as complement:
Whether the complement can use ‘a/an’ depends on the subject.I don’t want to summarize a rule with this situation. I think I can control it by intuition.
eg: Mr. Robert was president of the school. Someone say he is a better president than Mr. White. Mr. Robert is also a member of the Council of the city.
1.Definite article means ‘that’ or ‘those’.
2.The+Adjective = Noun. eg. the poor, the older
3.The + Proper nouns(专有名词) = Unique. eg. the sun
4.This is a most interesting book. 这是⼀本⼗分有趣的书。（Compare：This is the most interesting book I have ever read. 这是我读过的最有趣的⼀本书。）
冠词出现在补语位置，通常可以省略，如：The elected Tom (the 省略) chairman.但出现在其他位置，就要加冠词，如：Tom is the chairman.
量词，如strip(名词性)，a strip fish 一条鱼，是把不可数名词变成可数的方式。
a seat hill , a flat piece table, a piece of paper, a drop of water