Bonjour

Le present perfect est simple à former

HAVE au présent (has/have) + participe passé de la Base Verbale

But I have never skied in my life !

Have you ever done..?

.. but no I haven't.

You say that, but I have taken a ski-lift before...

Have you ever roller-skated or have you ever been on a hoverboard ?

Yes, I have, but that's different!

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Les réponses tags ou réponses courtes n'utilisent que l'auxiliaire et le sujet..

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Bonne journée