أفعَل (الوزن الرابع)
Form Four: Making It Happen
Form IV verbs follow the pattern أَفْعَلَ (past) and يُفْعِلُ (present). They typically turn an intransitive action (he went out) into a transitive one (he took out).
How It Works
Form IV is one of the most common derived forms in Modern Standard Arabic. Its primary functions and morphological rules include:
- Causative Function: It transforms a Form I verb into a causative one. For example, the verb خَرَجَ (to go out) becomes أَخْرَجَ (to take out/cause to go out). The causative can increase the number of complements, but the construction depends on the verb and meaning. For example, أَعْلَمَ can be used with a person object and بِـ for the information, as in the example below.
- Denominal Function: It can indicate entering a specific time or place. For instance, أَصْبَحَ means "to enter the morning" (from صَباح) and أَبْحَرَ means "to go to sea" (from بَحْر).
- Lexical Meanings: The pattern does not guarantee a predictable causative meaning in every word. Learn the attested meaning and complements of each verb.
- Morphology: In the past tense, it starts with a Hamzat al-Qat‘ (أَ). In the present tense, the prefix always takes a Damma (ُ), and the initial hamza is dropped (e.g., يُرْسِلُ instead of *يُأَرْسِلُ).
- Imperative: Unlike other forms where the hamza might be a Hamzat al-Wasl, Form IV always retains a 'cutting' hamza in the command form (أَرْسِلْ - Send!).
- Weak Roots: For hollow verbs, the middle radical becomes an Alif in the past (أَقَامَ) and a Yā’ in the present (يُقِيمُ). Crucially, this long vowel is dropped before a consonant that receives a sukun in the imperative (أَقِمْ) and jussive to avoid two sukūns meeting. It remains in أَقِيمِي (addressing one woman) and لَمْ يُقِيمُوا (they did not establish).
Participles and Verbal Nouns: A sound-root active participle follows مُفْعِل, and the passive participle follows مُفْعَل: مُرْسِل (sender) versus مُرْسَل (sent). The regular verbal noun is إِفْعَال, as in إِرْسَال (sending). Hollow verbs have adjustments such as إِقَامَة (establishing), with final ة.
Final Weak Roots: Compare أَعْطَى (he gave), يُعْطِي (he gives), أَعْطِ (give!, to one man), and أَعْطِي (give!, to one woman). In the unsuffixed jussive, لَمْ يُعْطِ drops the final weak letter; the feminine command retains its long ending. The verbal noun is إِعْطَاء. The participles also change: مُعْطٍ (a giver, indefinite nominative/genitive) and مُعْطًى (given).
Examples (4)
- أَخْرَجَ الطالِبُ الكِتابَ مِن الحَقيبةِ.
The student took the book out of the bag.
Word by Word: Took out the student the book from the bag.
Here, the Form I verb 'to go out' (خرج) is made causative (أخرج) to mean 'to take out'.
- أَعْلَمَ المُديرُ الموظفينَ بِالقَرارِ الجَديدِ.
The manager informed the employees of the new decision.
Word by Word: Informed the manager the employees of the decision the new.
Form IV of 'to know' (علم) means 'to make known' or 'to inform'.
- أَقامت الحُكومةُ مَشروعاً كَبيراً.
The government established a large project.
Word by Word: Established the government a project large.
This is a hollow root (ق-و-م). In Form IV, it means 'to establish' or 'to set up'.
- يُرْسِلُ الرَّجُلُ رِسالَةً كُلَّ يَومٍ.
The man sends a letter every day.
Word by Word: Sends the man a letter every day.
Note the Damma on the present tense prefix (يُـ) which is characteristic of Form IV.
Common Mistakes
Using a Fatha instead of a Damma on the present tense prefix.
يَخْرِجُ الرَّجُلُ الكِتابَ.يُخْرِجُ الرَّجُلُ الكِتابَ.In Form IV, the present tense prefix (يـ/تـ/أ/ن) must always take a Damma. Using a Fatha makes it look like a Form I verb.
Treating the initial Hamza as a vanishing Hamza (Wasl).
وَارْسَلَ الرِّسَالَةَ.وَأَرْسَلَ الرِّسَالَةَ.The Hamza in Form IV is a Hamzat al-Qat‘. It must be pronounced clearly even when preceded by another word like 'wa' (and).
Retaining the long vowel in the imperative of hollow verbs.
أَقِيمْ الصلاةَ!أَقِمْ الصلاةَ!The long vowel shortens before the final consonant with sukun in أَقِمْ. Do not extend this to every imperative: أَقِيمِي, addressed to one woman, retains the long vowel.
How It Connects
Learn This First
To understand Form IV (أفعَل), you first need to be familiar with the general system of Arabic verb weights (أوزان) and the basic three-letter verb (Form I). Since Form IV is often used to make a verb transitive (causing an action), knowing how the base verb functions is key to seeing how the prefix 'أ' changes its meaning.
Related Patterns
- The Ten Verb Shapes
Form IV is one of the ten primary patterns used to derive meaning from roots.
Level 3 - فعّلForm Two: Doubling the Middle Letter
Form II is also causative but often implies a process or intensity, whereas Form IV is a direct causative.
Level 3 - إفعالVerbal Noun of Form Four
This is the specific verbal noun pattern associated with Form IV verbs.
Level 3 - Verbs With a Weak Middle Letter
Hollow verbs behave uniquely in Form IV, changing the middle weak letter to Alif or Yā’.
Level 3 - Roots and Patterns
Understanding how roots fit into the Form IV pattern is essential for expanding vocabulary.
Foundations
Learn Next
Patterns that build on this one.
Practice أفعَل (الوزن الرابع) in Bubblegum
Poppy, your AI tutor, writes Arabic lessons at your level. Tap any grammar point in a lesson to see its full explanation.
