Underline the correct form to make conditional sentences.
1. If Rita opens / will open a boutique in the High Street, she’ll make lots of money.
2. If the economy doesn’t improve, lots of businesses will close / would close down.
3. This burglar alarm is so sensitive: it goes off if a mouse runs / will run across the floor.
4. George may go to prison unless he won’t pay / pays his taxes.
5. The company was / would be more successful if it spent more money on advertising.
6. If the employees of a company are / were happy, they work harder.
7. We might sell our business if it makes / would make another loss this year.
8. It looks like Molly’ll be okay, unless something new will happen / happens.
9. Unless Shelly had read him wrong, Jack would find / would have found her unorthodox approach irresistible.
10. Mat would not trust / didn’t trust that unless he had to.

Правильные формы в условных предложениях:

1. If Rita opens a boutique in the High Street, she’ll make lots of money.
   ✅ opens
   Это First Conditional: If + Present Simple, затем will + infinitive. Речь о возможной ситуации в будущем.

2. If the economy doesn’t improve, lots of businesses will close down.
   ✅ will close
   Это First Conditional: если экономика не улучшится, бизнесы могут закрыться.

3. This burglar alarm is so sensitive: it goes off if a mouse runs across the floor.
   ✅ runs
   Это Zero Conditional: описывается обычный факт или закономерность. После if используется Present Simple.

4. George may go to prison unless he pays his taxes.
   ✅ pays
   Unless означает «если не». После него обычно используется Present Simple, а не отрицательная форма с will.

5. The company would be more successful if it spent more money on advertising.
   ✅ would be
   Это Second Conditional: If + Past Simple, затем would + infinitive. Говорится о нереальной или маловероятной ситуации.

6. If the employees of a company are happy, they work harder.
   ✅ are
   Это Zero Conditional: общее утверждение о том, что счастливые сотрудники обычно работают лучше.

7. We might sell our business if it makes another loss this year.
   ✅ makes
   После if в условных предложениях не используется will. Здесь возможное событие в будущем → Present Simple.

8. It looks like Molly’ll be okay, unless something new happens.
   ✅ happens
   После unless используется Present Simple, даже если речь идёт о будущем.

9. Unless Shelly had read him wrong, Jack would have found her unorthodox approach irresistible.
   ✅ would have found
   Это Third Conditional: If + Past Perfect, затем would have + Participle II. Говорится о прошлом, которое уже нельзя изменить.

10. Mat would not trust that unless he had to.
    ✅ would not trust
    Это Second Conditional: would + infinitive используется для воображаемой ситуации. После unless стоит Past Simple (had), что указывает на условие.

Итоговые ответы:

1. opens

2. will close

3. runs

4. pays

5. would be

6. are

7. makes

8. happens

9. would have found

10. would not trust