In this lesson we will Insha Allah learn the cases of the Diptotes i.e.,
  إِعرَابُ الأسْمَاءِ الْمَمْنُوعَةِ مِنَ الْصَّرْفِ  :

• Unlike the ordinary nouns, "The Diptotes" do not take double vowel mark. Similarly, Diptotes do not take the genitive case Kasra.

• We know that the nouns take genitive case i.e., Single Kasra if it is definite مِنَ الْجَامِعَةِ and double Kasra if it is indefinite فِي مَسْجِدٍ, When either it is in the possessive expression or when it is preceded by a preposition.
   

However diptotes الْمَمْنُوْعِ مِنَ الْصَّرْفِ take fatha instead of a kasra if in genitive case. We have already learnt in the previous lesson i.e., (Lesson 20 section 4) that Diptotes are those nouns or adjectives which never take Tanwin i.e., Double Vowel Mark. So whenever a diptote noun is preceded by a preposition or is Mudhaf Ilaihi it will take a fatha instead of a kasra so if we say for example Ahmad's book i.e., كِتَابُ أَحْمَدَ

• The same is the case with all the other groups of diptoses we have learnt so far.

• Lets take some examples for this rule: