What’s the difference between a-nis and an-dràsta?

Dè an diofar eadar a-nis agus an-dràsta?

a-nis
now
an-dràsta
now

This is a really common question for learners. Use  an-dràsta  to state that something is the case right now, at the present moment, but it is ephemeral or temporary. Use a-nis to mean from now on or evermore.