FORGET, REMEMBER, REGRET + V-ING
I've stopped drinking soda.
I tried to give up sweets, but I just couldn't do it.
try = try without success
I forgot to shake the president's hand.
to = in order to
I tried giving up coffee for a whole year, but then I started drinking it again.
I stopped to pick up some fruit juice at the store.
FORGET, REMEMBER, REGRET + TO+ VERB
FORGET, REMEMBER, REGRET SOMETHING THAT SOMEONE NEEDS OR NEEDED TO DO
FORGET, REMEMBER, REGRET THAT SOMEONE DID SOMETHING
try = experiment with
I don't drink it now.
I remember thanking my professor as I left.
I'll never forget going up to my college diploma.
I always remember to say thank you.