One wouldn't believe there were ancient peoples able to calculate the exact date and time of the winter solstice,
Nerozumím proč tam není ING tvar being able to calculate, který zastupuje who were able to calculate.
One wouldn't believe there were ancient peoples being able to calculate the exact date and time of the winter solstice,…
Tady není důvod tam dávat 2× BE:
Some people are bad.
There are bad people.
Some people are able to do sth.
There are people able to do sth.
Je to přídavné jméno a tak se s ním pracuje. (TO) BE
není nutnou součástí.
Podívej se na další příklady třeba do Oxfordu: http://www.oxfordlearnersdictionaries.com/…glish/able_1?…