PRESENTE DEL VERBO "TO BE"

To be = Ser ó Estar
Affirmative Sentence:
Full forms: (Formas completas)                                          Short forms:
                                                                               (Formas abreviadas)           
I am................... Yo soy / estoy                                                  I'm 
You are.............. Tú eres / estás - Vos sos/estás                        You're
He is.................. El es / está                                                       He's
She is ............... Ella es / está                                                     She's
It is ................... Esto es / está                                                    It's
We are .............. Nosotros somos / estamos                              We're
You are ............ Ustedes son / están                                          You're
They are ........... Ellos son / están                                               They're

Negative Sentence:

Full Forms:                                                                  Short Forms:          

I am not................... Yo no soy / estoy                        I'm not
You are not.............. Tú no eres / estás -                     You're not / You aren't
                                 Vos no sos/estás

He is not.................. El no es / está                              He's not / He isn't
She is not............... Ella no es / está                             She's not / She isn't
It is not................... Esto no es / está                            It's not / It isn't
We are not.............. Nosotros no somos / estamos      We're / We aren't
You are not............ Ustedes no son / están                   You're not / You aren't
They are not........... Ellos no son / están                        They're not / They aren't

Interrogative Sentence:
Full Forms:                                                                    
Am I ?.......................... Soy / Estoy yo ?
Are you ?..................... Eres / Estás tú ?
Is he ?.......................... Es / Está él ?
Is she ? ....................... Es / Está ella ?
Is it ? .......................... Es / Está esto ?
Are we ? .................... Somos / Estamos nosotros ?
Are you ? ................... Son / Están ustedes ?
Are they ?................... Son / Están ellos ?