usage of Estoy and Soy
Why do we sometimes use estoy and sometimes soy when the both meant "I am"? Estoy triste (I am sad)
and
Soy baja. (I am short).
5 Answers
Estoy is used for a condition ,ie sad which is generally a temporary thing.Soy is used for a characteristic that is generally permanent.ie short,tall,etc
My Spanish teacher would say, "How you feel and where you are always use estar".
http://www.spanishdict.com/topics/show/41
thanks