As if this was not enough: Another bunch of these tend to mean something different in each structure. Look here:
This means the old lady is probably one of those treasure troves of gossip and they don't want her
to hear anything. So they stop their conversation.
However, a little grammatical variation changes this situation completely.
the old hag is transformed into a nice granny they want to have a chat with. So
begin - dread - forget - keep - need - regret - remember - stop - try