French language Q&A Forum

The translation from this phrase is ‘the last days have been freezing’ - shouldn’t it be ‘les jours derniers’ as dernier in front of the noun implies the last time ever while after implies last most recent time according the the lesson on placement of dernier in relation to the noun

In an example: Ma mère m'a acheté une robe ________. 

Can't you use either nouvelle or neuve?

In the explanation of this lesson page, there is a N/B: 

ATTENTION: you cannot use preposition + quoi, either for living or non-living things. Only the options above are correct in French. 

However, I have found a sentence «C'est ce à quoi je pensais» - is this not an example of 'preposition + quoi' ?

When this command is negated, it becomes "Ne vous dépêchez pas ! (or ne te dépêche pas). I could not understand the rationale for this structure by reading the current lesson.  I am guessing the reason may be because, nous, vous,  and te are pronouns and so surrounded together with the verb by ne and negative word. Clarification would be greatly appreciated.