Há três passos para formar a Question Tag.
I. Achar o sujeito da oração → Colocar o sujeito em forma de Subjective Pronoun no final
II. Achar o Tempo Verbal → Colocar o verbo auxiliar antes do Subjective Pronoun
III. Se a Oração for Afirmativa → Question Tag Negativa (sempre na forma abreviada)
IV. Se a Oração for Negativa → Question Tag Afirmativa
Exemplos:
Carol teaches English, doesn’t she?
It is hot today, isn’t it?
Juan didn’t play yesterday, did he?
Bruna won’t work this week, will she?
EXCEPTIONS
THERE TO BE → TO BE THERE
There is a drugstore near, isn’t there?
There wasn’t a doubt, was there?
INDEFINITE PRONOUN (-ONE/-BODY) → AUXILIARY + THEY
Someone called, didn’t they?
Anybody can do it, can’t they?
INDEFINITE PRONOUN (-THING) → AUXILIARY + IT
Something will happen, won’t it?
Nothing else matters, does it?
LET’S → SHALL WE
Let’s study together, shall we?
Let’s go dinner, shall we?
I AM → AREN’T I
I am a bit crazy, aren’t I?
I’m here with you, aren’t I?
IMPERATIVE → WILL YOU
Pay attention, will you?
Don’t sleep now, will you?