Case ending – إِعْرابٌ

If the noun is in the nominative, accusative, or genitive case, the adjective will also be in the nominative, accusative, or genitive case, respectively:

• nominative
• Accusative
• Genitive
•  

Nominative case – حَالَةُ الرَّفَعِ

فَضْلًا مِّن رَّبِّكَ ۚ ذَٰلِكَ هُوَ الْفَوْزُ الْعَظِيمُ 

As bounty from your Lord. That is what is the great attainment. (44:57)

Accusative case – حَالَةُ الَّصَبِ

جَزَاءً مِّن رَّبِّكَ عَطَاءً حِسَابًا

[As a] reward from your Lord, [a generous] gift [made due by] account, (78:36)

Genitive case – حَالَةُ الْجَرِّ

لِيَوْمٍ عَظِيمٍ 

For a tremendous Day – (83:5)

If اَلْمَوْصُوفُ is a broken plural or a group of non-living things, then the اَلصِّفَةُ will be singular and feminine.

Examples:

فِيهَا سُرُرٌ مَّرْفُوعَةٌ

Within it are couches raised high (88:13)

وَنَمَارِقُ مَصْفُوفَةٌ

And cushions lined up (88:15)

In a possessive phrase, the possessed – اَلْمُضَافُ will be considered a proposer noun; therefore, its adjective will be made definite by adding the article اَلْ.

Example 1:

بَيتُ اللَّهِ الحَرامُ

The holy house of Allah

بَيْتٌ is a common noun. However, here it comes in the possessive case and acts as اَلْمُضَافُ and will thus because a proper noun. The definite article اَلْ is added to the adjective حَرَامٌ to bring it in agreement with the proper noun.

Example 2:

 تِلْكَ آيَاتُ الْكِتَابِ الْمُبِينِ

These are the verses of the clear Book. (26:2)

المُبِين is the adjective of الْكِتابِ, and they agree with each other in terms of number, gender, etc.

بَيْتُ اللَّهِ الْعَظِيْمُ

The great house of Allah

بَيْتُ اللَّهِ الْعَظِيْمِ

The house of Allah, the Greatest

In the above sentences, it is clearly understood by the E’raab – إِعْراب which noun the adjective is describing.