French language Q&A Forum

What is the difference between devoir in Le Conditionnel Passé and L'imparfait?

For example: Where do these two questions differ?

1. Tu devais fermer la porte à clé.

2. Tu aurais dû fermer la porte à clé.

And please don't simply translate them into English. Paraphrase would be better for me to understand. S'il vous plaît !

Can the word taux be used instead of tarif? Is there a difference between the two?

Why is it c'est here and not il?
Tu aimes le violet ? Oui, c'est très joli! 

Wish could explain more how en dans du etc in the example is right for you.. some are obvious.. what if you do not know what is a region city province  etc etc.. do not specifically show in beginner questions why exactly your example follows the rule.  it is rudimentary boring for you.. else its back to having to memorize what is correct what is not. especially in the beginner examples. so frustrating. 

My answer to a question in the quiz wasn't in the dropdown. Please could you explain why the phrase My little boy is in kindergarten uses 'en' instead of mon petit garçon est à l'école maternelle? Thank you.

Is there a difference in usage between these three translations for "it took me an hour to do something":

"Il m'a fallu une heure pour faire qch"

"J'ai mis une heure pour faire qch"

"Ça m'a pris une heure pour faire qch"

Thank you in advance

Can I say "en profiter le plus" for "make the most of it", instead of "en profiter au maximum"?

Why pendant and durant are used ? there are no clear begin and end in this sentence.