Choose the plain or emphatic pattern according to the intended meaning, while keeping the noun of مَا nominative and forming the predicate correctly.
Intended meaning
Arabic pattern
The two girls are not truthful
مَا الْبِنْتَانِ صَادِقَتَيْنِ
The women are not liars
مَا النِّسَاءُ كَاذِبَاتٍ
The female students are not present
مَا الطَّالِبَاتُ حَاضِرَاتٍ
They are certainly not believers
مَا هُمْ بِمُؤْمِنِينَ
You are certainly not mad
مَا أَنْتَ بِمَجْنُونٍ
These are not hypocrites
مَا هَؤُلَاءِ مُنَافِقِينَ