These examples include attached pronouns, plural subjects, and explicit objects, but the negation rule stays the same.
Idiomatic meaning
Arabic sentence
They did not kill him
مَا قَتَلُوهُ
You all did not read the Quran today
مَا قَرَأْتُمُ الْقُرْآنَ الْيَوْمَ
Their trade did not prosper
مَا رَبِحَتْ تِجَارَتُهُمْ
Zaynab did not help Fatimah
مَا نَصَرَتْ زَيْنَبُ فَاطِمَةَ
The boy did not drink the water
مَا شَرِبَ الْوَلَدُ الْمَاءَ