French language Q&A Forum

Why has 'Mort' as the past participle of Mourir changed spelling to 'mour' ? I understand adding the 's' to make it match. 

Even in the 'learn & discuss; section, it show the past participle as 'mort'. is this an error ?

Does "des lèvres minces" also work?

I see that some verbs that take de or à and the infinitive drop the preposition when an object follows the verb.  As an example, choisir de drops the preposition when referring to an object as follows:

Je choisis de partir

Je choisis la cérise

As opposed to rêver that keeps its preposition in both cases:

Je rêve de partir

Je rêve du paradis

Is there a rule for this?

Sentance was given Quand vous y êtes retourné whereas the correct is Quand vous y êtes retournés

Why is au cas où il y’aurait du soleil not acceptable? 

'qu'il m'a donnée pour mon treizième anniversaire.' - the link you provide with this question, 'special cases of past participle agreement with avoir' describes that, in passé composé with avoir, the past participle must agree with the object when the verb is preceded by a direct object, but also explicitly states that the rule does not apply to indirect objects. Is not 'me' in this case an indirect object (he gave it to me)?

I don’t understand the context in which I have to use it. Right now I’m learning that I have to use it with avant que and with jusqu’à ce que, but I don’t understand why it fits there.

Thank you In advance