Open the brackets.Put the verbs into Present Perfect.1.I never (to eat) caviar.2.We (not to be) to Spain yet.3.She (not to write) to me since last summer.4. My friend and I (to see) an interesting film recently. 5. They (not to have) a holiday this year.6.My elder sister just (to come ) back.7. My father already ( to read) these magazines.8. The pupils ( not to do) Exercise 5 yet.9.His mother never ( to translate) such difficult articles. 10. I (to call ) him several times this week.

Нужно раскрыть скобки и поставить глаголы в Present Perfect. Напомню форму: have/has + V3 (Past Participle).
Часто встречающиеся слова-маркеры: never, yet, since, recently, just, already, several times this week — всё это типично для Present Perfect.

1. I have never eaten caviar.

• I → have

• eat → eaten

• never часто употребляется с Present Perfect: “никогда (к настоящему моменту)”.

2. We haven’t been to Spain yet.

• we → have

• отрицание: haven’t

• be → been

• yet обычно в конце предложения в вопросах/отрицаниях.

3. She hasn’t written to me since last summer.

• she → has

• отрицание: hasn’t

• write → written

• since last summer = “с прошлого лета” (точка начала).

4. My friend and I have seen an interesting film recently.

• my friend and I = множественное число → have

• see → seen

• recently хорошо сочетается с Present Perfect.

5. They haven’t had a holiday this year.

• they → have

• отрицание: haven’t

• have → had

• this year = “в этом году (до настоящего момента)”.

6. My elder sister has just come back.

• sister (3-е лицо ед.ч.) → has

• come → come (у него форма V3 совпадает с V1)

• just ставится между has и V3.

7. My father has already read these magazines.

• father → has

• read → read (пишется так же, произношение другое)

• already обычно между has и V3.

8. The pupils haven’t done Exercise 5 yet.

• pupils (мн.ч.) → have

• отрицание: haven’t

• do → done

• yet в конце.

9. His mother has never translated such difficult articles.

• mother → has

• translate → translated

• never в Present Perfect: “никогда в жизни до сих пор”.

10. I have called him several times this week.

• I → have

• call → called

• several times this week = “несколько раз на этой неделе (неделя ещё не закончилась)”.