Meaning of When
Bangla: যখন, যাহাতে
Adverb / ক্রিয়া বিশেষণ / क्रिया-विशेषण
at what time or period? how long ago? how soon?: When are they to arrive? When did the Roman Empire exist?
under what circumstances? upon what occasion?: When is a letter of condolence in order? When did you ever see such a crowd?
at what time: to know when to be silent.
at the time or in the event that: when we were young; when the noise stops.
at any time; whenever: He is impatient when he is kept waiting.