When the vocative noun is a single definite name or a specifically intended indefinite noun, remove tanwin if it is present. This form is called fixed on the nominative form (مبنی بر رفع).
Base form
What to notice
زَيْدٌ، وَلَدٌ، نَائِمٌ
tanwin is present before calling
مَرْيَمُ، إِبْرَاهِيْمُ، مُوْسَى
no tanwin is written in these forms
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When the vocative noun is a single definite name or a specifically intended indefinite noun, remove tanwin if it is present. This form is called fixed on the nominative form (مبنی بر رفع).
Base form
What to notice
زَيْدٌ، وَلَدٌ، نَائِمٌ
tanwin is present before calling
مَرْيَمُ، إِبْرَاهِيْمُ، مُوْسَى
no tanwin is written in these forms