1 - He was able to identify the correct answer without any difficulty.
اون بدون هیچ مشکلی تونست پاسخ صحیح رو تشخیص بده.
2 - He was unable to answer the difficult question.
اون قادر به پاسخ دادن سوال سخت نبود.
3 - I was unable to answer the question in time.
من نتونستم به موقع به سؤال پاسخ بدم.