When to use clock in Korean
Korean: 시계[ si-gye ]

When to use it
A clock is something that shows the time. You can see a clock on a wall, on a desk, or in a room at home. In Korean, 시계 is used when you talk about checking the time or using a clock.
Example sentences
거실 벽에 큰 시계가 있어요.
There is a big clock on the living room wall.
교실 시계가 열 시를 가리켜요.
The classroom clock points to ten o'clock.
공원 입구에 시계가 있어요.
There is a clock at the park entrance.
시계를 보세요. 늦었어요!
Look at the clock. We are late!
가게에서 새 시계를 샀어요.
I bought a new clock at the store.
호텔 방에 시계가 없어요.
There is no clock in the hotel room.