French language Q&A Forum

Hello. Please correct the sentence "We like going for walks 'at' the weekend" to "We like going for walks 'on' the weekend" . The use of 'at' in incorrect in this context.

I no longer get the written text to accompany the spoken words . I found it useful to be able to compare 

'As for "avoir peur", it's a fixed expression always followed by the preposition de (literally to have fear of), so when used with the definite article les, de + les contract into des :
Il a peur des chiens. => He's scared of (the) dogs. 
In the negative, as we said above, les remains the same, so it applies to its contracted form as well: Il n'a pas peur des chiens.'

Does this apply only to fixed expressions ending 'de' as in the case above?

Why is the translation for crois think?  Wouldn’t pense make more sense? Thank you!

This may be a stupid question but I'm confused by the position of 'le' in these two examples:
'Non, je ne le savais pas ' and 'Non, je ne sais pas le faire'
From looking at the first example I would have assumed the second sentence would be 'Je ne le sais pas faire' - please can you help?  

Est-ce que c'est simplement une question de niveau?