Primer Condicional - (type I)
First Conditional - (type I)

Se forma con if + simple present + simple future. Se emplea cuando una situación es real o posible: If it rains today, I'll stay at home. Aquí tienes algunos ejemplos traducidos.

If clause	Main clause
If + Present tense	will / can / may / must + verb
If it rains today,	I'll stay at home

• If it rains today, I'll stay at home.
  Si llueve hoy, me quedaré en casa.
• If he is busy now, I will come back tomorrow.
  Si está ocupado ahora, regresaré mañana.
• If I have time, I'll visit my parents this afternoon.
  Si tengo tiempo, visitaré a mis padres esta tarde.
• If it is warm tomorrow, we'll go to the beach.
  Si está caluroso mañana, iremos a la playa.
• If it is cold, you must wear warm clothes.
  Si está frío, debes usar ropa abrigada.
• If he doesn't do his homework, he can not go to the party.
  Si él no hace su tarea, no puede ir a la fiesta.
• If she doesn't call you, you can call her.
  Si ella no te llama, tú puedes llamarla.
• If you work hard, you may become a millonaire someday.
  Si trabajas duro, puede que te conviertas en un millonario algún día.
• If you spend more than you earn, you'll become a poor man.
  Si gastas más de lo que ganas, te convertirás en un hombre pobre.
• If they don't invite you, you must not go.
  Si ellos no te invitan, no debes ir.
• If we don't hurry, we'll miss our bus.
  Si no nos apuramos, perderemos nuestro autobus.
• If you pay now, you'll get a discount.
  Si pagas ahora, obtendrás un descuento.
• If they don't want to go out, they can stay home.
  Si no quieren salir, se pueden quedar en casa.
• If you drink too much, you'll get drunk.
  Si bebes demasiado, te emborracharás.
• If you feel sick, you must stay in bed.
  Si te sientes enfermo, debes quedarte en cama.
• If they don't come here, we'll have to go there.
  Si ellos no vienen aquí, tendremos que ir allí.

Conditional Sentences
(Frases condicionales)

Q1 of 9: If I win the lottery, I _____ (buy) a new car.

Q2 of 9: If we spoke better English, we _____ (move) to the United States.

Q3 of 9: If it _____ (rain), we should go to the movies.

Q4 of 9: They _____ (wait, not) in the rain, had you called them to tell them you were going to be late.

Q5 of 9: If Peter _____ (work) less, he would have more time to study.

Q6 of 9: It would have been a nice holiday, if I _____ (break, not) my leg.

Q7 of 9: _____ you _____ (go) to a different show if you can't get tickets to "Les Miserables"?

Q8 of 9: If she were shorter, she _____ (wear) high heels more often.

Q9 of 9: _____ you _____ (be) angry if I hadn't called to tell you I would be late?

Exercise