Hi,I know that some irregular verbs has two kinds of past and participle. for example:
BET: Bet/ betted
KNIT: Knit/ knitted
When can I use one form, and when I should use the other one? Or can I choose? Please, I need your advice
Is this what you are referring to:
BASE FORM ------ PAST SIMPLE ------ PAST PARTICIPLE
Abide ----------- Abode/Abided ------ Abode/Abided/Abidden
If so, you can use any of them. As for this example, you can use both ABODE and ABIDED - whichever one you want.
Does it help?