Episode #22 of my series "9273 roots": 20 questions for the woman who explains Egyptian Arabic expressions by annotated movie clips: Nesrin Amin.
The correct vowel endings damma, kasra, fatha in Arabic can be a headache. If you are careless, you could turn verse 9:3 of the Qur'an into blasphemy (kufr).
Both ma ما and lam لَمْ can negate the past tense. How and when should they be used?