Упражнение 1. Подчеркните правильный вариант ответа. 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.
The correct answer is "opens" because this is a first conditional sentence, which expresses a possible condition and its likely result in the future. In the conditional clause (if clause), we use the present simple tense. In the result clause, we use the future simple tense with "will."
2. If the economy doesn’t improve, lots of businesses will close / would close down.
The correct answer is "will close" because this is also a first conditional sentence. The use of "doesn't improve" indicates a possible condition in the present. Therefore, in the result clause, we use the future simple tense with "will."
3. This burglar alarm is so sensitive: it goes off if a mouse runs / will run across the floor.
The correct answer is "runs" because this is a zero conditional sentence. It expresses a general truth or a fact. In such sentences, we use the present simple tense in both the conditional and the result clauses.
4. George may go to prison unless he won’t pay / pays his taxes.
The correct answer is "pays" because this is a second conditional sentence. In the conditional clause, we use the simple past tense (even though "may" is used here) to signify an unlikely or hypothetical condition. In the result clause, we use the simple present tense.
5. The company was / would be more successful if it spent more money on advertising.
The correct answer is "would be" because this is a second conditional sentence. In the conditional clause, we use the simple past tense to express an unlikely or hypothetical condition. In the result clause, we use the simple present tense.
6. If the employees of a company are/were happy, they work harder.
The correct answer is "are" because this is a zero conditional sentence. It expresses a general truth or a fact. In such sentences, we use the present simple tense in both the conditional and the result clauses.
7. We might sell our business if it makes / would make another loss this year.
The correct answer is "makes" because this is a first conditional sentence. In the conditional clause, we use the present simple tense to express a possible condition in the present. In the result clause, we use the simple present tense.
8. It looks like Molly’ll be okay, unless something new will happen / happens.
The correct answer is "happens" because this is a first conditional sentence. In the conditional clause, we use the present simple tense to express a possible condition in the present. In the result clause, we use the simple present tense.
9. Unless Shelly had read him wrong, Jack would find /would have found her unorthodox approach irresistible.
The correct answer is "would find" because this is a third conditional sentence. In the conditional clause, we use the past perfect tense to express a condition that didn't happen. In the result clause, we use the simple past tense.
10. Mat would not trust/ didn’t trust that unless he had to.
The correct answer is "didn't trust" because this is a third conditional sentence. In the conditional clause, we use the past perfect tense to express a condition that didn't happen. In the result clause, we use the simple past tense.