We just learned that I am happy in Spanish is Estoy feliz.
Now let's learn how to say You are sad.
We can break it up into two words:
You are - Estás - sounds like ess-tah-ss /?/
sad - triste - Sounds like tuh-dee-ss-tay /?/
So all together Estás triste sounds like ess-tah-ss tuh-dee-ss-tay.
(from: wikipedia - Association of Spanish Language Academies)
Do you remember how to say it in French?
French - You are sad - Vous êtes triste
