Question

Spanish - How do you know which form of the verb ser to use in a sentence?

Answer 1

Look at the pronoun?

Answer 2

I do not know if this is what you want to ask, but if the pronoun is "yo", use "soy", and etc.

Answer 3

Complete conjugation here: http://www.spanishdict.com/conjugate/ser

Answer 4

I do know that,
soy
eres
es
somos
sois
son.

I'm just getting confused when I have to decide which form to use in a sentence.

Answer 5

Look at the pronoun of the sentence
I: soy
You (singular+familiar): eres
He/She: es
You (singular+formal): es
We: somos
You (plural+familiar): sois
They: son
You (plural+formal): son