فلماذا

In a sentence

• فلماذا لا نحاول مرة أخرى؟

  So why don't we try again?

  The word 'فلماذا' is used here as a questioning lead to introduce a suggestion for recommencing an effort.

• أنا متعب للغاية، فلماذا لا تستريح قليلاً؟

  I am very tired, so why don't you rest a bit?

  'فلماذا' introduces a logical continuation of a thought leading to a proposed action based on a stated condition.

• يبدو أنها تعرف الإجابة، فلماذا لم تخبرنا بها؟

  It seems she knows the answer, so why didn't she tell us?

  Here, 'فلماذا' serves to question someone's lack of action in connecting to previously presented information.