Nunation (تنوين) in Arabic is used when there is no definite article ال. But that is only half of the truth. The idea is much deeper.
Your have several options to express the comparative and superlative in Egyptian Arabic. An overview.
Arabic does not have a verb "to have". Instead, you use constructions with prepositions and adverbs to express the same idea.
The Arabic broken plural has the effect that scholars still debate how to properly classify the several branches of Semitic languages.
In Arabic, there is a special way to express the English word both.
In Arabic, there is the grammatical subject and the "logical subject" which is used with quantifiers. You need to decide which one you use for the verb.