Chinese Grammar Wiki BOOK

My 5 highlights

• Unlike 两 (liǎng), 二 (èr) is not used to say there are "two" of something, and does not generally occur with measure words by itself.

• Nouns are linked to other nouns with 是 (shì). Nouns are linked to adjectives with 很 (hěn).

• 是 (shì) is only used to link two nouns. It cannot be used to link a noun and an adjective.

• Use 没有 (méiyǒu) to negate past actions (to say that someone didn't do something, or something didn't happen).

• Any time you want to state how many of a noun in Chinese, you probably need a measure word.