I Can Speak Korean book for Intermediate_Chapter 2. Dictation_그런데

I Can Speak Korean for Intermediate 

Chatper 2. Dictation - 그런데 

Korean Translation: 
에어컨을 켰어요. 그런데 시원하지 않았어요. = 에어컨을 켰는데 시원하지 않았어요.
English Translation: 
I turned on the air conditioner. However it wasn't cool. = I turned on the air conditioner but it wasn't cool.