Phrases we usually use when there is a risk of danger.
Fráze ktoré zvyčajne používame keď sa vyskytne riziko nebezpečenstva.
LOOK OUT!
WATCH OUT!
When we give advice not to take risk: 
Be careful!
Beware of …….. ( dog)
When we leaving place or saying good-bye to someone:
Take care!
Good luck!