1). How long is it since you were in London?
2). How long has it been since you were in London?
What is the difference in meaning between these two sentences?
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Sign up to join this community1). How long is it since you were in London?
2). How long has it been since you were in London?
What is the difference in meaning between these two sentences?
1). How long is it since you were in London?
2). How long has it been since you were in London?
Both sentences have the same meaning. Also, both sentences are grammatically correct.
Both are correct. They mean the same.
We usually say 'How long is it since...'
'How long is it since you were in London?' (=When were you in London?)
'It is four years since I was in London.'