Meaning of zài:
zài
在
Verb
to exist; to be alive
Xiǎo māo zài jiǎoluò lǐ shuìjiào.
小猫在角落里睡觉。
The kitten is sleeping in the corner.
Preposition
(of sb or sth) to be (located) at
Tā zài xuéxiào.
他在学校。
He is at school.
Particle
(used before a verb to indicate an action in progress)
Tā zài dúshū.
他在读书。
He is reading.
