Why do we not meet to discuss this matter in detail on Monday
Answers
Explanation:
You don't say "discuss about". "discuss" means "talk about", so "discuss about" would be like saying "talk about about".
Regarding the second part: you can use "in or "during", they're interchangeable in this context. But, "our Monday's meeting" is wrong: say either "Monday's meeting" or "our Monday meeting". The latter makes "Monday" sound like the title of the meeting, and would only most appropriate if you have a meeting every Monday morning. If this isn't the case, say "Monday's meeting" or "our meeting on Monday".
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Regarding the second part: you can use "in or "during", they're interchangeable in this context. But, "our Monday's meeting" is wrong: say either "Monday's meeting" or "our Monday meeting". The latter makes "Monday" sound like the title of the meeting, and would only most appropriate if you have a meeting every Monday morning. If this isn't the case, say "Monday's meeting" or "our meeting on Monday".