The Present After أن and لن
The subjunctive mood (al-muḍāriʿ al-manṣūb) is used when a verb is dependent on another action or a specific particle. It typically changes the final vowel from -u to -a.
How It Works
The subjunctive mood (المضارع المنصوب) is used in formal Arabic to express purpose, intent, or future negation. It is triggered by specific particles.
1. Direct Particles:
- أَنْ (an): Links two verbs. Note: When followed by لَا, it merges into أَلَّا (allā), which still triggers the subjunctive.
- لَنْ (lan): Emphatic future negation ('will not').
- كَيْ / لِكَيْ: Used to express purpose ('so that').
- إِذَنْ (idhan): 'In that case'. It triggers the subjunctive if it starts the response, refers to the future, and is not separated from the verb (except by an oath, a vocative, or the negative particle لَا).
2. Particles with 'Implied An':
The verb is mansūb because of a hidden 'an'. This is optional after the Lam of Purpose and in specific conjunction cases involving pure nouns, but mandatory after others:
- لِـ (li-): The 'Lam of Purpose'.
- حَتَّى: Meaning 'until' or 'so that'. Crucially, it only triggers the subjunctive if the action of the verb is in the future relative to the main verb.
- أَوْ (aw): When it means 'until' or 'unless'.
- لَامُ الجُحُود: The 'Lam of Denial', used after a negative form of كَانَ.
- فـ (Fa al-Sababiyya): The 'F of Causality', used after a Negation or a Request (Talab) to show the result. A Request includes: Command, Prohibition, Question, Wish, Hope, Offer (Ardh), and Urging (Taḥḍīḍ).
- وَاوُ المَعِيَّة: The 'Waw of Simultaneity', used after a Negation or a Request to show two actions happening at the same time.
3. Morphological Changes:
- Sound-ending Forms Without Agreement Suffixes: The final damma changes to fatha, including نَكْتُبُ → أَنْ نَكْتُبَ (that we write).
- The Five Verbs: The final ن is dropped in the dual, masculine plural, and feminine singular. A silent alif is added to the masculine plural (e.g., يَكْتُبُوا).
- Feminine Plural: The form remains unchanged because these verbs are mabni (indeclinable).
- Weak Verbs: The fatha is hidden on alif maqsūra due to 'impossibility', but it is visible on verbs ending in ي or و because the fatha is 'light' to pronounce.
Examples (6)
- أريد أن أسافرَ إلى القاهرة.
I want to travel to Cairo.
Word by Word: I-want that I-travel to Cairo.
The verb أسافرَ is in the subjunctive mood because it follows the particle أن.
- لن ينجحَ المهملُ في الامتحان.
The negligent person will not succeed in the exam.
Word by Word: Will-not succeed the-negligent in the-exam.
The verb ينجحَ is in the subjunctive mood because it follows the future negative particle لن.
- ما كان الطالبُ ليكذبَ.
The student would never lie.
Word by Word: Not was the-student to-lie.
The verb is in the subjunctive mood after the Lam of Denial, which follows a negative form of كان.
- أفكر في الالتحاق بالجامعة كي أتعلمَ اللغة.
I am thinking of joining the university so that I may learn the language.
Word by Word: I-think in the-joining with-the-university so-that I-learn the-language.
The verb أتعلمَ is in the subjunctive mood because it follows the direct particle كي.
- لا تأكلا حتى تغسلا أيديكما.
Do not (you two) eat until you wash your hands.
Word by Word: Do-not you-two-eat until you-two-wash hands-your-two.
The verb تغسلا has dropped its final ن because it is in the subjunctive mood after حتى.
- سأجتهد في دراستي. إذن تنجحَ.
I will work hard in my studies. In that case, you will succeed.
Word by Word: I-will-strive in my-study. Therefore you-succeed.
The particle إذن triggers the subjunctive here because it starts the response and is not separated from the verb.
Common Mistakes
Keeping the 'nūn' in plural forms after subjunctive particles.
يُريدونَ أَن يَكتُبونَ.يُريدونَ أَن يَكتُبوا.In the subjunctive mood, the final 'nūn' must be dropped from the 'Five Verbs' (plural and dual forms).
Confusing 'an' (subjunctive particle) with 'anna' (that, followed by a noun).
أَعْرِفُ أَنْ هُوَ طالِبٌ.أَعْرِفُ أَنَّهُ طالِبٌ.أَنْ (an) is followed by a verb in the subjunctive, while أَنَّ (anna) is followed by a noun or a pronoun suffix.
Assuming the fatḥa is hidden on all weak verbs.
لَنْ يَدْعُو.لَنْ يَدْعُوَ.Unlike the indicative mood, the fatḥa is actually pronounced and written on verbs ending in 'wāw' or 'yā' in the subjunctive because it is 'light' (khafīf) to pronounce.
How It Connects
Learn This First
To understand the Subjunctive Present (المضارع المنصوب), a learner must first be comfortable with the basic Present Tense (المضارع) and the general concept of grammatical moods and cases (الإعراب), specifically the 'Mansub' state which dictates the change from the default 'u' ending to the 'a' ending.
- The Present Tense
The Subjunctive (Mansub) is a specific mood of the present tense verb, so the learner must first understand how to form the basic present tense.
Level 1 - The Object Ending
Understanding the general 'Mansub' state (usually marked by Fatha) is necessary to recognize the specific changes that occur in the present tense verb.
Level 2
Related Patterns
- The Plain Present Ending
This is the default 'indicative' mood of the verb before a particle like 'an' or 'lan' is added.
Level 3 - The Shortened Present
The jussive mood also drops the 'nūn' but uses a sukūn instead of a fatḥa in singular forms.
Level 3 - Dropping the ن in Plural Verbs
Explains the specific rule for dropping the final 'n' in plural and dual verb forms.
Level 3 - أن + Subjunctive VerbWanting to Do Something
Focuses specifically on the use of 'an' to express 'wanting to' or 'needing to'.
Level 2 - لن + Subjunctive VerbWill Not
Focuses specifically on negating the future using the subjunctive mood.
Level 2
Learn Next
Patterns that build on this one.
Words in This Pattern
Practice The Present After أن and لن in Bubblegum
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