هٰذِهِ وَرْدَةٌ حَمْرَاءُ — This is a red flower. حَمْرَاءُ is a nominative adjective with visible ḍamma.
رَأَيْتُ وَرْدَةً حَمْرَاءَ — I saw a red flower. حَمْرَاءَ is an accusative adjective with visible fatḥa.
نَظَرْتُ إِلَى وَرْدَةٍ حَمْرَاءَ — I looked at a red flower. حَمْرَاءَ is genitive, but its genitive sign is fatḥa in place of kasra because it is a diptote.
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Causes of Diptote Status — Femininity and Its Conditions
هٰذِهِ وَرْدَةٌ حَمْرَاءُ — This is a red flower. حَمْرَاءُ is a nominative adjective with visible ḍamma.
رَأَيْتُ وَرْدَةً حَمْرَاءَ — I saw a red flower. حَمْرَاءَ is an accusative adjective with visible fatḥa.
نَظَرْتُ إِلَى وَرْدَةٍ حَمْرَاءَ — I looked at a red flower. حَمْرَاءَ is genitive, but its genitive sign is fatḥa in place of kasra because it is a diptote.