HSK 1 grammar · pattern
是
是 — to be (A 是 B)
Pattern
+ +
( ) can be left out · other words may come before, between and after
How it works
是 links two nouns and means "A is B". It joins a subject to a noun, not to an adjective — for adjectives use 很 instead.
Examples
我是学生。
Wǒ shì xuésheng.
I am a student.
他是我的老师。
Tā shì wǒ de lǎoshī.
He is my teacher.
Related

See it in a story
In the app, 是 is underlined wherever it appears in the stories you read, and practised with sentences from them. Free.