What is the meaning of "때"?
I found this sentences in a book.
What is the meaning of "때"?

여러분은 거울이 깨끗하지 않을 때 어떻게 하십니까?

I found "때" is very common in Korean sentence.
such as " 그런데" "는/은데"

are they all have the same meaning?

Question

What is the meaning of "때"?
I found this sentences in a book.
What is the meaning of "때"?

여러분은 거울이 깨끗하지 않을 때 어떻게 하십니까?

I found "때" is very common in Korean sentence.
such as " 그런데"  "는/은데"

are they all have the same meaning?

Answer

in this sentence, 때 means 'when', 'the moment', 'the time'.

"what do you do when the mirror is not clean."

but, '그런데' means 'but'. it's different. maybe it sounds similar.

때 :: [ddae]
그런데 :: [geu-leon-de(dae)]