Answer:
Como dice arriba de la hoja, el primer condicional equivale a una posibilidad real y su estructura es:
Future+if+present
If+present+future
El futuro se forma con will (afirmativo) / won't (negativo)+verbo base.
1. I will stay at home if it rains this afternoon. (¿Lo ves? Primero va el futuro y luego el presente, como en la primera estructura).
2. If my brother goes abroad, I will be very worried. (En este caso se ha usado la segunda estructura, pero siempre es lo mismo: el if es acompañado del presente; el futuro va "solito").
3. You won't earn enough money if you don't work enough hours. (Esta vez lo único que cambia es que en vez de afirmativa es negativa).
4. Melissa won't be able to go to the cinema if she doesn't finish her homework.
5. If I go to the supermarket later, I will buy some tomatoes.
6. Peter will get wet if he doesn't take an umbrella.
7. If I find the book you lent me, I will give it back to you.
8. They will be angry if we don't visit them next Saturday. We promised to go.
9. What will happen if you don't go to work tomorrow? (Esto es lo mismo, pero en forma de pregunta).
10. Many workers will lose their work if that factory closes down.
11. I won't buy a bigger house if I don't get promoted at work.
12. If he doesn't finish the vegetables, he won't have a dessert.
13. My uncle will be able to go to the opera if he remembers to get the tickets.
14. If you don't put sugar in your coffee, it won't taste nice.
15. Sandra, if you don't hurry up, you will be late for the meeting.
16. Cristopher will be so happy if he finds the money he lost.
17. Your motorbike won't break down if the mechanic checks it.
18. If you don't take an aspirin, your headache won't dissappear.
Explanation:
