French language Q&A Forum

I *think* I understand when to use “avoir besoin de” or “devoir”, but how/where does “falloir” work? (Note: I asked a similar question in the lesson on “falloir”)

How do I know which one to use?  If I want to say “he needs to go grocery shopping” (for example), are “il doit faire ses courses” and “il faut faire ses courses” equivalent or is there some nuance that doesn’t come through in English?

In this exercise the sentence including "pouvoir payer"...why is this not "je ne peux pas?"  Also later in the dialogue when referring to M. Duport was his representative, the dialog uses present tense C'est not C'etait.  why?

bonjour à tous, J'habite à Cairo en Egypt  

Où habitez vous?

Vous habitez où?

I understood that the french for ' an app' was 'une appli' but this wasn't given as an option. Am I incorrect?

Why is this in the subjunctive?

What word would I use in french to refer to ALL the items on a menu or la carte?

Not categories (like Entrees, Aperitifs, etc.), but the general words

In English, I would say "items" I think, but in French, is 
"éléments" right? 

Just working on something and was curious!

WRITE THE FOLLOWING TIME IN FRENCH USING MOINS LE QUART. 1. 3:45 2. 20:45 3. 21:45 4. 7:45 5. 23:45

In an exercise I should fill in the following gap:

Mon fils ________ aller aux toilettes.

I choose "envie d'" but the solution seems to be "a besoin d'". But one example in the lesson about "Avoir envie de = To feel like, want to (Avoir envie de = To feel like, want to (French Expressions with avoir))" is:

So I would like to know, if both are correct. And if not, how do I choose the right one?

Best regards,
Martin