坐 + 在 + Place + 上
The verb 坐 (zuò) means "to sit" and is used to describe the action or state of being seated. It is commonly followed by 在 and a location to indicate where someone sits, as in 坐在椅子上 (sit on a chair).
请坐在这把椅子上等一下。
qǐng zuò zài zhè bǎ yǐzi shàng děng yíxià.
Please sit in this chair and wait a moment.
他每天早上都坐在窗户旁边看书。
tā měitiān zǎoshang dōu zuò zài chuānghù pángbiān kànshū.
Every morning he sits by the window and reads.
别站着了,快过来坐吧。
bié zhànzhe le, kuài guòlái zuò ba.
Don't just stand there, come over and sit down.