Independence Day in Uzbekistan September 1

Has the secretary come? I have not written my exercises.
2. Present Perfect bir necha marta takrorlangan ish-harakatni ifodalaydi: I have read that book twice. I have seen that film three times.
3. Present Perfect ko‘pincha quyidagi ravishlar bilan ishlatiladi: ever biror vaqt, never hech qachon, often tez-tez, ko‘pincha, already allaqachon, yet hali, allaqachon, lately yaqinda, just hozirgina.
I have never read that book. I have often been there.
He hasn’t finished his work yet. Have you ever been to India?
Izoh: just now hozirgina ravishi bilan Simple Past ishlatiladi: I saw him just now.
Men uni hozirgina ko‘rdim.
4. Hali tugamagan vaqt ko‘rsatkichlari – today bugun, this week shu
hafta, this month shu oy, this year bu yil bilan Present Perfect ishlatiladi: Have you read the newspaper today?
Izoh: today, this week, this month kabi hali tugamagan vaqt ko‘satkichlari mavjud bo‘lgan gaplarda bugunning, shu haftaning, shu oyning ma’lum bo‘lagi ko‘zda tutilganda Simple Past ishlatiladi:
I got up early today. He was late for the lecture today.
5. Present Perfect since (biror vaqtdan hozirgacha) predlogi bilan
ishlatiladi: I haven’t heard from him since June He has known Mr. Bell since 1998.
Since bog‘lovchisi bilan bog‘langan qo‘shma gapning bosh gapida Present Perfect ishlatiladi, ergash gapida Simple Past ishlatiladi:
I have only received two letters from him since I came back from London.
I haven’t heard from him since he left Tashkent.
Since ravishi bo‘lgan gapda ham Present Perfect ishlatiladi:
He left Tashkent in 1998, and I haven’t seen him since.
6. Davom zamonda ishlatilmaydigan fe’llar bilan Present Perfect
Continuous o‘rnida Present Perfect ishlatiladi:
He has been here since two o’clock. I have known him for three years.
Ba’zi fe’llar bilan ham Present Perfect ham Present Perfect Continuous ishlatilishi mumkin: I have lived in London for five years (yoki: I have been living in London for five years).
7. after, when, as soon as, until (till), if bog‘lovchilari bilan bog‘langan
payt va shart ergash gaplarda Future Perfect o‘rnida Present Perfect
ishlatiladi: I shall go to the country as soon as I have passed my examinations. I’ll give you the book after I have read it.