I stopped to buy a newspaper because all the news is available online.
stopped buying
I remember to leave my keys here, but now I can't find them.
leaving
If you don't understand, try to look at the rules again.
correct
He went on to talk even though the teacher asked him to stop.
went on talking
We'd been working all morning so we stopped having a break.
stopped to have
On my home from school, I stopped buying bread.
stopped to buy
I don't mean being rude, but I think you've made a mistake.
mean to be
Do you realise that doing this course means paying a fee?
correct
I'm trying to learn Icelandic, but it's really difficult.
correct
I like to check my emails at least once a day.
correct