Would 

Principalmente, usamos el verbo auxiliar modal would para uso condicional.

En inglés, hay cuatro condicionales: cero, primero, segundo y tercera condicional. Solamente las condicionales segunda y tercera requieren el uso de would, pero haremos un resumen de todas las condicionales, aun así.

Cero condicional: se usa para presentar hechos o situaciones reales en el presente

(If + presente simple + presente simple).

• If I light a match, it burns.
• If you boil water, it reaches 100 degrees Celsius.
• If you attack animals they get angry.

Primer condicional: se usa para presentar hechos o situaciones en el futuro

(If + presente + will + infinitivo).

• If you go to school, I’ll buy you a present.
• If you eat too many calories, you’ll get fat.
• If he comes early, we’ll be happy.

Segundo condicional (con would): Se usa para situaciones hipotéticas o imaginarias en el presente o el futuro

(If + pasado simple + would + infinitivo).

• If you lived closer to home, you’d be able to commute faster to work.  (‘d = forma de contracción de ‘would’).
• If only she knew about the living circumstances, she wouldn’t be living there today.
• If Harry took the daily commute to London at 5.00 am, he would arrive much earlier.

Tercer condicional (con would): se usa para circunstancias absolutamente hipotéticas e imaginarias en el futuro o pasado

(If + pasado perfecto + would + have + participio pasado).

• If we had lived in New York we would have met so many interesting people.
• If only I had been born in the first century, I would have lived through the Roman Empire.
• If I had won the lottery I would have given you at least half of my winnings. 

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