هٰذِهِ امْرَأَةٌ حُبْلَى — This is a pregnant woman. حُبْلَى is a nominative adjective with an estimated ḍamma.
رَأَيْتُ امْرَأَةً حُبْلَى — I saw a pregnant woman. حُبْلَى is accusative with an estimated fatḥa.
مَرَرْتُ بِامْرَأَةٍ حُبْلَى — I passed by a pregnant woman. حُبْلَى is a genitive adjective with an estimated fatḥa instead of kasra because it is a diptote.
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Causes of Diptote Status — Femininity and Its Conditions
هٰذِهِ امْرَأَةٌ حُبْلَى — This is a pregnant woman. حُبْلَى is a nominative adjective with an estimated ḍamma.
رَأَيْتُ امْرَأَةً حُبْلَى — I saw a pregnant woman. حُبْلَى is accusative with an estimated fatḥa.
مَرَرْتُ بِامْرَأَةٍ حُبْلَى — I passed by a pregnant woman. حُبْلَى is a genitive adjective with an estimated fatḥa instead of kasra because it is a diptote.