Should i ground my adhd teenager with bad grades?

I have a 15 year old daughter who recently got diagnosed with adhd.she has been grounded a majority of junior high & freshmen year.she has very good behavior & she try's hard. i feel like she doesn'tt learn a lesson when i let her go out with friends, i receivedd her report card with b's 3d's & 1 F. how should i help or understand what she is going threw, and is grounding a solution? any information would help thank you!