Eclipsis and Lenition
I read the things below and did the lessons and put more things into a fridge than I could possibly imagine, but I'm still a bit shaky on them. Does anyone have any tips?
I was gonna suggest memrise but I don't see anything focusing on them =/ I guess you could just make your own course for that. I'm trying to work on a course there that reflects what we learn on duolingo (including this especially) but it won't we be done for a while. Maybe none of it's necessary & you'll even catch on just going down the tree.
There's a good explanation of all the cases where you use lenition here: http://www.nualeargais.ie/gnag/lenition.htm
Lenition and eclipsis are difficult, so don't expect to pick up all the rules at once. I did Irish in school for 13 years and I still don't know all the rules about them!