出典:Tatoeba
No one could solve the problem.
No one was able to solve the problem.
Nobody was able to solve the problem.
No one was able to solve the problem.
Nobody was able to solve the problem.
Nobody has solved the problem.
No one could solve the problem after all.
Nobody has solved the problem.
Nobody has solved the problem.
It is said that nobody has solved the problem yet.
Nobody can solve this problem.
I can't speak about this problem with anyone.
So far nobody has figured out the tickler.
Nobody was able to suggest a solution.
I don't have anything to say on that subject.
None of us was able to answer the question.
Nobody can solve this problem.
It is difficult, if not impossible, to solve this problem.
None of them ever managed to get it right.
We cannot discuss this problem separately from that problem.