Bonjour !
In the sentence,
C'est hors de question d'aller à la plage par cette pluie !
“par” cette pluie seems more appropriate for “by” the rain, as in, washed away by the rain. “… sous cette pluie” seems like it might be more appropriate here. No?
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Also, in the sentence,
Je t'attends depuis longtemps.
Is there something about the verb being followed by “depuis” that requires it to be present tense, rather than imparfait.
So, lit. , I am waiting for you since … , rather than, I've been waiting for you since … ?
Merci
Robert