French language Q&A Forum

I am trying to figure out how to say "I am good/bad at (something)" in French. There seems to be discrepancies between sources online about what prepositions to use.

For example, I searched "I am good at piano" on an online translator. It gave me many options: Je suis doué pour piano, je suis bon au piano, je suis bon en piano, and je suis doué en piano. I know that you use different prepositions depending on what adjective is used (doué vs bon), but why does this translator give so many options, and which ones are correct?

Also, for example, to say "I am bad at guitar", the translator says you can say either je suis mauvais à la guitarre OR je suis mauvais en guitarre. Which one of these is correct?

Basically, which of these prepositions (en/au/à la/pour) do you use when saying je suis nul/mauvais/bon/doué AT something?

Thank you!

I received a question to translate "You're laughing while looking at me." where the correct answer is "Vous riez en me regardant." 

Doesn't regarder mean "to watch" and voir means "to see"?

Wouldn't "looking" in this case mean "en voyant"? 

Thank you for your help. 

“je me sens bien”, et, “je vais bien?”   Merci!

Why is "Merci de m'avoir aidé aujourd'hui, c'était super !" not translated as "Thank you for having helped me today" It’s not the same thing as ‘thank you for helping me’ – or is it?

Hello, If I take a subscription, which I would use at the later beginner/early intermediate level, could my husband use a Beginner strand of the program on the same subscription? Or must we each buy a subscription? Does anyone have experience with this?

I don’t get the nuance of ‘J’arrive dans 10 minutes’.  'I arrive in 10 minutes' is the same, to me, as saying ‘I will arrive in 10 minutes.   

Il ne s’occupe jamais de rien

What is the rule that requires either de or à, as seen in the above sentences?