Nouns category

Common and Proper Nouns

普通名词和专有名词

Common Nouns

Which means：General

For instance：

city

mountian

Common nouns are only capitalized if you find them at the beginning of sentences.

You can say：

He lives in a city.

Mountians are my favorite.

Proper Nouns

Which means：Specific

For instance：

Shanghai

Kilimanjaro（乞力马扎罗山）

Proper nouns are always capitalized.

So you might say:

I want to go to Shanghai.

Have you been to Kilimanjaro before?

Kilimanjaro is my favorite mountian.

Concrete and Abstract Nouns

具体名词和抽象名词

Concrete Nouns

Which means：Physical

For instance：

dog

ball

cliff（峭壁；悬崖）

Abstract Nouns

Which means：Not physical

For instance：

sadness

happiness

freedom

permission（许可）

liberty（解放）

injustice（非正义）