French language Q&A Forum

Hello,

I learnt in another lesson that after "Quand" usually + Futur simple (Quand/pendant que + future tense (Le Futur Simple) - not the present tense = When/while I do something in the future (Sequence of Tenses in French) ), but in this lesson it is + Futur Antérieur. So how do you know when to + which tense?

Or are there cases where they can be used interchangeably?

Thank you.

Searching through Google I came across Lawless pieces on variable and invariable pronouns. I'm still not sure how my use of Personne was wrong, or how aucun can be either an adjective or a pronoun, but I can live with that expecting a glimmer eventually, but it would be helpful if you could explain the terminology. Why are they called variable and invariable negative pronouns? Is it because the invariiable ones don't agree, whilst the variable ones do? This is one of those things people who know this stuff take for granted.

How would "what's that (used) for" and "what does that mean" look in french (considering the three ways of asking question(s))?

1) À quoi ça sert? Que veut dire ça?

2) Ça sert à quoi? Ça veut dire quoi, ça?

3) Qu'est-ce que ça sert? Qu'est-ce que ça veut dire?