"할머니께서 아프셔서 얼굴이 하얘요."

Translation: Grandmother is sick, so her face is pale.

[MatthewEpp5]

"Grandmother's face is pale because she is sick" should be accepted.

[jiraiya1601]

can someone please explain '아프셔서'? where does the '셔' come from?

[dipagssi]

It comes from the honorific suffix ~시다. 아프다 + 시다 = 아프시다. And the ~서 is the conjunction for because, therefore, so, etc. 아프시다 + ~서 = 아프셔서.

[Paul759392]

Putting The Grandmother instead of just Grandmother makes it incorrect- that makes no sense at all