He won't pass the driving test if he doesn't learn how to park. He won't pass the driving test how to park. If the weather doesn't change, we'll go to the mountains next week. We'll go to the mountains next week unless I won't finish this work on time if you don't help me. I won't finish this work on time me. I'll call the police if they don't stop that noise I'll call the police unless

1) You have mistaken me for (потому что mistake somebody for) someone else. I don't know your sister, I am not her friend. (Present Perfect здесь нужен для описания недавнего действия, связанного с текущей ситуацией)

2) I think my parents have lent money to somebody. (нет указания на точный момент в , когда произошло  действие, поэтому используем перфект)

3) Did  you see Jane last Friday? (last Friday - маркер Past Simple)

4) Have you bought a new flat this month? (this month/week/year - маркер Present Perfect)

5) I have read six books this week.

6) Throughout the town, church bells rang and fireworks lit the sky. (Past Simple используется здесь для передачи последовательности действий в . Нет связи с настоящим)

7) My paycheck has risen by 50% since last year. (речь о результате/ изменении в оплате, произошедшем с момента в к моменту речи)