A : I'm planning to go to the library on this Monday. Do you want to go with me?
B : I'm sorry, but I have other plans
Why is this conversation unnatural? Could you explain about it?
"on this Monday" is not natural when the following Monday is meant. We say "on Monday" or "this Monday", but not both together. The last sentence is missing its full stop.
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"on this Monday" is not natural when the following Monday is meant. We say "on Monday" or "this Monday", but not both together.
The last sentence is missing its full stop.
Otherwise, it is OK.