Rule 1: 1. Descriptive nominal sentences
A description is a chain of nominal sentences. Three shapes recur. Subject + adjective: اَلصَّحْرَاءُ وَاسِعَةٌ the desert is vast. Predicate first when the predicate is a prepositional phrase and the subject indefinite: فِيهَا جِبَالٌ عَالِيَةٌ in it are high mountains, لِلْبَدَوِيِّ خِيَامٌ the Bedouin has tents. Participle or adjective + preposition: مَشْهُورٌ بِـ famous for, مُحَاطٌ بِـ surrounded by, مُتَّصِلٌ بِـ joined to, غَنِيٌّ بِـ rich in. The pronoun هِيَ or هُوَ may be inserted between a definite subject and a definite predicate: بِلَادُ الْعَرَبِ هِيَ الْأَرْضُ الَّتِي ... the land of the Arabs is the land which ...
جَزِيرَةُ الْعَرَبِ مُحَاطَةٌ بِالْبَحْرِ مِنْ ثَلَاثِ جِهَاتٍ.
jazīratu l-ʿarabi muḥāṭatun bi-l-baḥri min thalāthi jihātin
The Arabian Peninsula is surrounded by the sea on three sides.
فِي جَنُوبِهَا جِبَالٌ عَالِيَةٌ وَأَوْدِيَةٌ خَصْبَةٌ.
fī janūbihā jibālun ʿāliyatun wa-awdiyatun khaṣbatun
In its south there are high mountains and fertile valleys.
Predicate first, indefinite subject after it.
اَلْيَمَنُ مَشْهُورٌ بِأَمْطَارِهِ وَتُرْبَتِهِ الْخَصْبَةِ.
al-yamanu mashhūrun bi-amṭārihi wa-turbatihi l-khaṣbati
Yemen is famous for its rains and its fertile soil.
لَيْسَ فِي الْجَزِيرَةِ نَهْرٌ دَائِمٌ، وَإِنَّمَا فِيهَا أَوْدِيَةٌ يَجْرِي فِيهَا الْمَاءُ بَعْدَ الْمَطَرِ.
laysa fi l-jazīrati nahrun dāʾimun, wa-innamā fīhā awdiyatun yajrī fīha l-māʾu baʿda l-maṭari
There is no permanent river in the peninsula; there are only valleys in which water runs after rain.
لَيْسَ فِيهَا ... وَإِنَّمَا فِيهَا: 'there is not ... there is only'.