Аж хелп Поставте дієслова в дужках у Present Perfect або Past Simple Tenses.
1) Helen has bought (to buy) a nice souvenir for her parents already.
2) Bob
(to go) surfing last summer.
3) My granny
(to bake) a strawberry cake already.
4)
you ever
(to be) to Egypt?
5) We
(to have) a picnic last Saturday.
6)
Vicky
(to use) the computer yesterday?
7) Mike
(not to see my photos yet.
8) I
(not to learn) this grammar rule yesterday.​

Відповідь:

2) Bob went surfing last summer.

3) My granny has baked a strawberry cake already.

4) Have you ever been to Egypt?

5) We had a picnic last Saturday.

6) Did Vicky use the computer yesterday?

7) Mike hasn't seen my photos yet.

8) I didn't learn this grammar rule yesterday.​

Пояснення:

1) Helen has bought a nice souvenir for her parents already.

2) Bob went surfing last summer.

3) My granny has baked a strawberry cake already.

4) Have you ever been to Egypt?

5) We had a picnic last Saturday.

6) Did Vicky use the computer yesterday?

7) Mike hasn't seen my photos yet.

8) I didn't learn this grammar rule yesterday.​

Объяснение:

Обычно, если указано время выполнения действия  (например: yesterday, last summer, two years ago и т.д.), то мы употребляем Past Simple. (Глагол во 2 форме или с окончанием -ed)

Если у нас есть результат действия в настоящем, при этом время его выполнения не указано, плюс у нас есть такие слова, как yet, already, just и т.п., то мы используем Present Perfect. (have/has + глагол в 3 форме или с окончанием -ed)