And yet in real English... before it rains, the sky clouds over.
Agreed. It seems like the last few skills in the tree have not been reviewed by a native English speaker.
Very strange English here.
"Before it rains" would be a much better alternative to "Before raining"
A înnora ..... get cloudy
Nor - nori. .... cloud-clouds
Norul - norii. ..... defined
That's no English.
I'd say "Before starting to rain"