Ola pessoal! Hello folks!
Bom, definitivamente, este artigo da bbc que vou lhes mostrar a seguir tirou todas as minhas duvidas em relaçao ao 'I've never done' e 'I never did'.
'Talking about tenses, let’s look at using the present perfect tense with ‘never’. Doing that emphasises that we are talking about the whole period of time, or our whole life up till the present, just like this:
I’ve never had any problems with my teeth.
I’ve never known how to do origami.
I’ve never understood why you moved to Mongolia.
And if you use the past simple with ‘never’, it means you are talking about a completed time period in the past. Here’s an example:
I never had a mobile phone or a computer phone when I was a teenager.
I never knew how to ride a bike till I was 20!
So I wonder if you know the difference now between 'I never knew’ and ‘I’ve never known’? If I asked you this question, you should reply: Well, I never knew the difference between these phrases until today!'
Espero ter ajudado!