you are hurt: tu es blessé
i am hot: j'ai chaud
he is cold: il est froid
they are scared: ils ont peur
Bonus question:-
Oui,
If you are having dinner and you receive good service then it is nice to leave a few Euros for your server; around one to two is usually enough. You can leave around 5-10 percent if you are very happy with your meal. This will be more than appreciated.
