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we only were knowing each other for two weeks.poprawne?

nie.

we only knew each other for two weeks

had known

czemu past perfect?

znamy się od 2 tygodni?

ja to zrozumialem, że znaliśmy się dwa tygodnie, a znajomość już się skończyła
a znamy sie od dwóch tygodni to będzie we have known each other for 2 weeks

a co znaczy 'znamy/znalismy sie dwa tygodnie'? To nie znaczy 'koniec znajomosci'!

no tak, dlatego zaproponowałem po jednej wersji dla: znaliśmy się przez dwa tygodnie (ale np. on umarł) i znamy się od dwóch tygodni
a czemu tam chcesz użyć past perfect? :)

dlatego ze to nie znaczy 'koniec znajomosci'. Konteksty typu 'ale on umarl' wystepuja bardzo rzadko.

no rozumiem zdanie typu "my neighbour died and it's a pity because we had known each other only for 2 weeks", ale w innym kontekscie po co dawać past perfect?

simple past moze byc
i nie musi koniecznie od razu znaczyc ze ten ktos umarl kogo sie znalo
przykladow jest wiele

jezeli jest to w zdaniu z when, a prawdopodobnie when w kontekscie sie pojawia, to simple past nie pasuej
nb. w google 'we knew each other for two weeks' daje niby36000 trafien, ale tylko 3 strony i po kliknieciu na 3. strone okazuje sie, ze wynikow jest 22.

nie malem na mysli w kontekscie z 'when' i nie mialem na mysli przyklady z google

czyli ludzie sobie tak to upraszczaja?

najwyrazniej tak
google niewatpliwie jest 'powerful search engine' ale nawet on nie jest w stanie wychwycicroznych waryacji przykladow uzycia jakiegos zdania w zakresie 'spoken, fiction, magazine, academic, newspaper

przykladow jest wiele wiecej, to sa niektore z nich

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Ours was not a very passionate affair, for we only knew each other for three weeks and never met again. The letters that we wrote each other afterwards, however, were as passionate as our vocabulary allowed. (Stephen Haggard, I'll go to bed at noon, The Atlantic Monthly: p. 665)

We knew each other for six months. We worked together. We went out one time. It happened. It was a mistake and we have a child and he sees him and he pays me child support and he's a good father. (She tricked me! Women who trick men into fatherhood, Ind_Geraldo,)

They knew each other for a dozen years, they visited back and forth. There was actual hands-on experience. Hillary Clinton' s visit to Pakistan when Bhutto was prime minister in 1995 was an important trip, and that she can point to.
(NBC_Matthews, Michele Norris of "All Things Considered," Howard Fineman of Newsweek, Andrea Mitchell of Author)

We knew each other for more than 30 years and had a relationship that was profound but hard to explain. (New York Times, Larry Rohter)

" Look, " she says, sweetly flashing the chunky diamond and platinum engagement ring Freddie helped create with jewelry designer Cathy Waterman. " We're the perfect example of timing, " she says. " We knew each other for years, but we were in different places. Years ago, I wouldn't have been ready to be married. Now I'm really ready. It's the easiest decision I've ever made. He's my best friend, " she says. An unexpected perk: " He grew up around women, so he leaves the toilet seat down!( Cosmopolitan, John Griffiths, Sarah rides a heat wave)

Former police officer Chris Hillis and prosecutor Steve Tauzer knew each other for almost 20 years. They were friends, neighbors, colleagues. But now, Chris Hillis stands accused of murdering Steve Tauzer. (CBS_48Hours, 48 Hours Investigates: `Who Killed the Prosecutor)

Thank you all very much for joining us. First to you, John and Sally. How did you guys meet? Ms-SALLY-NARKIS: Well, actually, we met through friends. Friends introduced us so we knew each other for about a year before we actually started dating.( NBC_TodaySat)

Then he asked,' Would you be kind enough, Commander, to describe to us your relationship with the Admiral?'' We were old friends. We knew each other for more than forty years. Young shipmates together. He was a fine man, Con Meredith-Lee. A brave sailor and a good friend. (Clubbed to death. Dudley Edwards, Ruth. London: Victor Gollancz Ltd, 1993)

co w tych zdaniach znaczy "each other"?

bo ja to rozumiem jako 'znaliśmy się każde dwa tygodnie' i trochę nie pasuje ;/

each other = nawzajem