French language Q&A Forum

In the Kwiz - 

Why is "J'ai dix minutes de retard” correct, and

“Je suis dix minutes en retard” is not?

I know it's simple, but I'm not seeing it.

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.