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Apr 7 at 2:29 comment added Thamilay Hello sir, as per my learning since means started in the past and still to present , why since can be used with present simple and it should be used with perfect tenses.It should be "how long is it from when you were in London" and "how long has it been since you were in london".I am confused,sir.@Samuel Muldoon
Oct 19, 2022 at 1:46 history answered Samuel Muldoon CC BY-SA 4.0