Ответ:
Номер 2
1) If they have enough money, they will open a restaurant next year.
2) I do not talk to you anymore if you will insult me
3) If he practises every day, he will become a champion.
4) If John does not keep his word, Jane will be angry with him.
5) She helps us if we will ask
Номер 3
1) We will buy this car if you give us a discount
2) If my dad finds his tools, he will be able to repair my bike.
3) nn will meet her wfriends from Italy if she comes to the party
4) If you don't help me, I won't pass the exam tomorrow.
5) If Dan doesen't give up smoking/ Lynn won't marry him
Номер 4
1) If you don't eat now, you will be hungry later.
2) She will be sad if he leaves
3) If you leave ice in the sun, it will melt
4) If we go to the show, we will have a lot of fun.
5) If you mix black and white, you will get grey.
Номер 5
1) it / rain tomorrow /we not /go to the park -
If it rain tomorrow, we won't go to the park
2) you / heat the water/ it/ boil. -
If you heat the water, it will boil
3) water/ freeze/ it/ turn to ice -
If water freezes, it will turn to ice
4) I / need your help/ I/ phone you -
If I need your help, I will phone you
5) we / pay for dinner/ you pay for lunch -
If we pay for dinner, you will pay for lunch