French language Q&A Forum

I wrote “Non, je ne suis pas contente du tout” and this answer was accepted as nearly correct. Why, what is the difference? I thought the two expressions are interchangeable.

thank you

How can "vous êtes arriv________ en retard" ever be "Vous êtes arrivé or arrivée en retard". It can surely only be "vous êtes arrivés" or "vous êtes arrivées en retard"??

Or there must be a preposition in between noun and 'penser', which means only either 'penser à + noun' or 'penser de + noun' ?

If 'penser+noun' exist, how to differentiate 'penser+noun' and 'penser à + noun'? 

Let's say I have a Mathematic problem and I am thinking/reflecting on it, hoping to come out with a solution. It should be 'penser' the mathematic problem or 'penser à' the mathematic problem?

If I finally think of the solution, is it correct to use 'penser à' the solution?

Thank you

The test asked non specifically to turn "Elles sont parties avant la fin du film"  into a question. While I know that I can reverse the order of the subject and the conjugated verb, isn't it also ok to use the phrase "est-ce qu' "?
My response "Est-ce qu'elles sont parties avant la fin du film" was marked incorrect and I am unclear why

The lesson contains no statement on how le conditional passé is formed, leaving the student to infer the rule from examples alone. I don't find that a great way to learn. Looking at some of the Q&A on this lesson from others it seems I'm not alone.