Question

Задание № 4:
Complete the sentences with the verbs in Past Simple or Present Perfect
1) You
(mistake) me with someone else. I don't know your sister, I am not her friend.
2) I think my parents
(lend) money to somebody.
3)
you
Jane last Friday? (see)
4)
you
a new flat this month? (buy)
5) !
(read) six books this week.
6) Throughout the town, church bells
(ring) and fireworks
(light) the sky.
7) My paycheck
(rise) by 50% since last year.​

Answer 1

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 прошлом, когда произошло  действие, поэтому используем перфект)

3) Did  you see Jane last Friday? (last Friday/month/year - 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 прошлом. Нет связи с настоящим)

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