In the sentence below: "In user-based approach, the recommendation is based on users of the same neighborhood, with whom he/she shares common preferences." why can't we say "In user-based approach, the recommendation is based on users of the same neighborhood, whom he/she shares common preferences with."
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1Does this answer your question? When is it appropriate to end a sentence in a preposition? – livresque Oct 20 '20 at 03:48
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1The issue here is that the word 'whom' is formal, whereas stranding the preposition at the end sentence instead of pied-piping it (with whom) is considered informal. So you have a mix of styles, which some may consider problematic. https://en.wikipedia.org/wiki/Pied-piping – Shoe Oct 20 '20 at 06:55