Sentence structure

Arabic divides sentences into two basic types — those that begin with a noun and those that begin with a verb — and the choice changes the grammar that follows.

Classical Arab grammarians divide every sentence into one of two camps: a nominal sentence, beginning with a noun, and a verbal sentence, beginning with a verb. The two types behave differently — different word order, different agreement rules, and different presence or absence of the verb "to be." For an English speaker, the most striking immediate consequence is that you can have a complete grammatical sentence in Arabic with no verb at all, and that when there is a verb, it usually comes first.

Nominal sentences

A nominal sentence begins with a noun (or pronoun) — the topic — and then says something about it — the comment. There is no copula. The English "is" or "are" of the present tense simply isn't there.

The topic is normally definite (al-bayt, anaa, hiya) and the comment is normally indefinite. That asymmetry is what tells the listener which is which when the order alone could be ambiguous.

For past- and future-tense versions of the same idea, you slot in kaana ("was") or sayakuun ("will be"):

Verbal sentences

A verbal sentence begins with a verb. The canonical word order in Modern Standard Arabic is verb–subject–object (VSO):

You can also flip to subject–verb–object (SVO), particularly to emphasise the subject or topicalise it. Many MSA news bulletins and most spoken dialects use SVO routinely, though VSO remains the default for elevated written registers.

The agreement rule that depends on word order

This is one of the genuinely strange rules of Arabic syntax. When the subject comes after the verb (VSO), the verb agrees only in gender, not in number. The verb stays singular even with a plural subject. When the subject comes before the verb (SVO), the verb agrees fully — both gender and number.

This rule, sometimes called partial agreement, is consistent in MSA and in classical Arabic. Some dialects relax it.

Object pronouns and word order

An object pronoun is suffixed to the verb, not free-standing:

Eight everyday sentences

Why English speakers find this hard

The missing copula needs unlearning. English-speaking beginners reflexively reach for "is" and "are" and produce sentences like al-bayt huwa kabiir (the house is big), which sounds odd or, in some readings, shifts the emphasis. Equally, the VSO order is a grammar-level habit to acquire. And the partial-agreement rule — verb stays singular when it precedes a plural subject — is consistent but almost impossible to guess from English instincts.

What it's called in the Arabic tradition

The two sentence types are الجُمْلَة الاِسْمِيَّة (al-jumla al-ismiyya, the nominal sentence) and الجُمْلَة الفِعْلِيَّة (al-jumla al-fiʿliyya, the verbal sentence). In a nominal sentence the topic is the مُبْتَدَأ (mubtada') and the comment is the خَبَر (khabar). In a verbal sentence the doer is the فاعِل (faaʿil) and the object the مَفْعول بِه (mafʿuul bih).