French language Q&A Forum

Does anyone know why you say: 

Je joue du piano but then you say: Je joue de la harpe

Does anyone know what the rule is for if you use Je joue de la or Je joue du?

What is the difference between:

Qu'est-ce qui marche le mieux ?

and the Que from the interrogative lesson Questions: Que ... = What?, e.g. :

Que marche le mieux?

What's the best way to recognize what is the best solution to use? The first thing that jumps out to me is that Que marche le mieux might be incorrect b/c there is not really a subject, but I would appreciate a more formal explanation, thank you!

Why isn't it "qu'on ne s'est pas vus"?  Thanks.

In the song "Aux Champs-Élysées" the first line is "Je m'baladais sur l'avenue". 

Is this a specific exception where you can use "sur" instead of "dans"?

It seems I am not the only one to have difficulty with these three concepts using rappeler.  I get it wrong in every A2 kwiz.  I think I need a simpler explanation.  I feel brain-dead with it at the moment, so I'm going to leave it and come back later.  That diamond is going to be elusive!

In comparing these three sentences, I notice that the verbs have similar translations (is/are getting or becoming):

Ses relations avec elle vont de mal en pis

Ma mémoire est de pire en pire

Les ordinateurs deviennent de mieux en mieux

Can these three verbs be used interchangeably with these expressions to mean is getting/going/becoming worse or better? Or is there a distinction to be made?

Thanks for your help!