"Ydw, dw i wedi mynd i'r parti."

Translation: Yes, I have gone to the party.

[pointthreefour]

Sometimes English simple past is accepted, sometimes not. Is that how it works, or should "Yes, I went to the party." be accepted here?

[GeoffTWO1]

Surely went and have gone are equivalent?

[GennyTunbr]

Try adding 'yesterday' or 'now' to the verb and you will see the difference.
She went to the party yesterday = simple past
(we don't say 'She's gone to the party yesterday)
She's gone to the party now = present perfect
(we don't say 'She's gone to the party yesterday')

[ibisc]

They are different tenses in both English and Welsh:

• dw i wedi mynd - I have gone (present perfect tense)
• es i - I went (simple past tense)

[AlexeiNewt]

Probably; many other languages do not make the distinction, whether at all or less than English.

[tu.8zPhLD72zzoZN]

I don't know. It seems that "have gone" is "wedi mynd" for the most part and Welsh has other ways to say "went"...

[Chris455154]

This is so clumsy in English

[cooellenper]

It makes sense if you think of it in the context of a phonecall with your friend:
"Where have you gone?"
"I have gone to the party"