I am currently learning about commas again. I would like to know if this is correct.
For a while, the situation seems to improve, but shortly after that, Mary decides to finally kill herself.
I chose to do it that way because "For a while" is an adverbial determination, ",but" introduces an independent clause, and "shortly after that" is introducing the independent clause?
I still have the feeling there is something wrong with the 3rd comma....?!