The Arabic Sentence — Basics of Case
We cover the equational sentence (no verb needed!), the definite article and sun/moon letters, and the nominative case ending. Master these and you understand the skeleton of every Arabic sentence.
A The Equational Sentence
There are two kinds of sentences in Arabic — those with a verb and those without. Sentences without a verb are called equational sentences. They correspond to English sentences using "to be" in the present tense: "I am a student," "The book is new."
In Arabic, no verb is needed. "I am Samiir" is simply أنا سمير. The subject is a pronoun; the predicate is the proper name.
| English | Arabic |
|---|---|
| I am Samiir. | أنا سَمير. |
| You are Muhammad. | أنتَ مُحَمَّد. |
| She is Samiira. | هِيَ سَميرة. |
| The student is new. | الطالبُ جَديد. |
| The book is excellent. | الكِتابُ مُمتاز. |
B The Definite Article
The definite article in Arabic is ال — attached directly to the noun. Arabic has no indefinite article; the absence of ال makes a noun indefinite.
The ل of ال assimilates to sun letters (pronounced near the front of the mouth, near the teeth). With moon letters it stays unchanged.
ت ث د ذ ر ز س ش ص ض ط ظ ل ن Example: الشَّمس = ash-shams (not "al-shams")
🌙 Moon letters (ل stays — you say "al-" clearly):
ا ب ج ح خ ع غ ف ق ك م ه و ي Example: الكِتاب = al-kitaab
C–D Case & The Nominative
Arabic is a case language. The role a noun plays in a sentence is shown by its case ending — a short vowel added to the noun's last letter. There are three cases: nominative, genitive, accusative.
The nominative case is used for: (1) the subject of any sentence, and (2) the predicate of an equational sentence.
Indefinite noun → two dhammas (tanwīn, pronounced as "-un") → طالبٌ (taalibun)
The Genitive Case & The Idaafa
The idaafa (إضافة, "annexation") is how Arabic expresses possession and noun-of-noun relationships. Once you truly understand it, entire passages open up.
A The Genitive Case
The genitive case is triggered by prepositions and by the idaafa construction. Instead of a dhamma, it uses a kasra (ِ) — the short "i" vowel — on the last letter.
Indefinite → two kasras (tanwīn-kasra) → طالبٍ (taalibin)
B Prepositions
Every Arabic preposition puts the following noun in the genitive case. Learn these — they appear on every page of Arabic text.
| Meaning | Arabic |
|---|---|
| in, at | في |
| on, above | على |
| from | مِن |
| to, toward | إلى |
| with | مَع |
| about, concerning | عَن |
| by, near | عِند |
C The Idaafa Construction
The idaafa chains two (or more) nouns together to show possession or a noun-of-noun relationship. Three rules govern it:
Rule 2: The second (and any later) noun is in the genitive case.
Rule 3: The whole phrase is definite if and only if the last noun is definite. Definiteness flows backward.
Structure: كِتابُ الطالبِ = the student's book
| English | Arabic |
|---|---|
| the student's book | كِتابُ الطالبِ |
| the door of the house | بابُ البَيتِ |
| the language of the Arabs | لُغةُ العَرَبِ |
| the teacher's office | مَكتَبُ المُدَرِّسِ |
| a book of a student (indef.) | كِتابُ طالبٍ |
Sound Verbs & Hollow Verbs — Form I
Arabic verbs are built on three-letter roots. Once you understand the patterns, you can read and produce hundreds of verb forms. This chapter covers Form I — the foundation of everything.
The Root System
Almost every Arabic word comes from a three-letter root (جذر, jidhr). The root carries the core meaning; different patterns (أوزان, awzaan) applied to the root create nouns, verbs, adjectives, and more.
For example, the root ك-ت-ب (k-t-b) relates to writing: كَتَبَ (he wrote), كِتاب (book), كاتِب (writer), مَكتَبة (library).
Sound Verbs — Form I
A sound verb has three strong root letters — no و, ي, or doubled middle letter. The Form I pattern is the most basic.
Present tense patterns: يَفعَلُ / يَفعِلُ / يَفعُلُ
The vowel on the middle root letter changes between past and present — you must learn this for each verb.
| English | Arabic (past / present) |
|---|---|
| he wrote / he writes | كَتَبَ / يَكتُبُ |
| he studied / he studies | دَرَسَ / يَدرُسُ |
| he opened / he opens | فَتَحَ / يَفتَحُ |
| she understood / she understands | فَهِمَت / تَفهَمُ |
| he went / he goes | ذَهَبَ / يَذهَبُ |
Hollow Verbs — Form I
A hollow verb has و or ي as its middle root letter. In many forms, that middle letter "collapses" into a long vowel or disappears, which is what makes hollow verbs tricky for learners.
Root ن-و-م (sleep): past → نامَ | present → يَنامُ
Root ب-ي-ع (sell): past → باعَ | present → يَبيعُ
| English | Arabic |
|---|---|
| he said | قالَ |
| he says / is saying | يَقولُ |
| she slept | نامَت |
| he sold | باعَ |
| he wanted / I want | أرادَ / أُريدُ |
| he came | جاءَ |
Form II Verbs & Commands
Form II verbs are derived from Form I by doubling the middle root letter. This adds intensifying or causative meaning — and once you see the pattern, you can derive hundreds of verbs.
A Deriving Form II
The rule is simple: double the middle root letter (add a shadda ّ over it). This consistently gives the verb a causative or intensive meaning.
Form I: عَلِمَ (he knew) → Form II: عَلَّمَ (he taught = caused to know)
Form I: كَسَرَ (he broke) → Form II: كَسَّرَ (he smashed / broke repeatedly)
| Form I | Form II | Meaning shift |
|---|---|---|
| دَرَسَ | دَرَّسَ | studied → taught |
| عَلِمَ | عَلَّمَ | knew → taught |
| كَتَبَ | كَتَّبَ | wrote → dictated |
| قَدَّمَ | — | already Form II (presented) |
B Form II Present Tense & Verbal Noun
The present tense of Form II follows a fixed pattern: يُفَعِّلُ. The verbal noun (masdar) is تَفعيل.
| Past | Present | Verbal Noun |
|---|---|---|
| دَرَّسَ | يُدَرِّسُ | تَدريس |
| عَلَّمَ | يُعَلِّمُ | تَعليم |
| كَتَّبَ | يُكَتِّبُ | تَكتيب |