правильно ли построено предложение? (если у меня небыло карандашей, то я брал карандаши моей сестры) то есть действие реально, но оно в это тоже какой то кондишонал или что то другое или так нельзя говорить?​

Всё правильно, чистый Past Perfect, но после запятой нужно поставить слово after. Или предложения можно преобразовать в Условно придаточные

Объяснение:

Я смог

If I had no pencils, I took my sister's pencils.

If I did not have pencils, I took my sister's.

If I did not have pencils, I took my sister's ones.

If I did not have pencils, I borrowed my sister's.

If I did not have pencils, I borrowed those of my sister.

If I did not have pencils, I borrowed some from my sister.

2) - their  office  hours don't begin  at 9 o'clock.

when do their  office hours begin?

3) - mr. bell isn't busy all day.

is mr.bell busy all  day?

4) - there aren't any cables on the table.

are there any cables on the table?

5) - she can't translate some letters from english into russian.

can she translate some letters  from  english into russian?

6) - he doesn't have any offers  fron bell& co.

does he have any offers from bell& co.

7) - mr. smith hadn't  bought several machines  from green& co by  june 2005.

had mr. smith bought  several  machines  from green& co  by june  2005?

8) - they weren't reading french newspapers yesterday at 5 o'clock.

when time were they reading french newspapers?

9) - the engineers didn't meet any inspectors  a week ago.

did the engineers  meet some inspectors  a week ago?

10) - we haven't received five enquiries from blake& co yet.

have we already  recieved five enquiries  from blake& co?

11) - they haven't  a lot of  offices in london.

do they have a lot of  offices  in london?

верная грамматика.

поставь "лучшее решение", если несложно.

see-saw; fly-flew; go-went; put-put; have-had; take-took; say-said; give-gave