Is it correct to say, 'Desde cuándo haces tal cosa?'. For example, 'Desde cuándo tocas el piano?', to elicit the answer, 'desde mi infancia'.
Thanks in advance.
Yes, that's correct. To ask someone "since when they do/have been doing something" the most natural way to ask is ¿Desde cuándo + verb in the present"?
I just added a note to that lesson to reflect this.
Gracias y saludos
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