ـان

Two of Something

Level 1

In Modern Standard Arabic, the dual (المثنى) is a specific grammatical category used for exactly two items. It is formed by adding the suffix ـان (-ān) to the singular noun.

How It Works

The dual is a fundamental part of Arabic number agreement. It is used whenever you are talking about exactly two people or things.

1. Formation:
The dual ending changes based on the grammatical case:

  • Nominative (-ān): Used for subjects (e.g., ولدانِ).
  • Accusative/Genitive (-ayn): Used for objects or after prepositions (e.g., ولدينِ).
  • For feminine nouns ending in tāʾ marbūṭa (ة), change the ة to a regular ت before adding the suffix (e.g., سيارة becomes سيارتان/سيارتين).

2. Spelling Rules for Endings:

  • Alif Maqṣūra (ى) and Long Alif (ا): In words of 4+ letters, the ى becomes ي (مستشفى → مستشفيان). In 3-letter words, both the ى and the ا return to their original root letter, either و or ي (e.g., عصا → عصوان).
  • Hamza (ء): If the hamza is part of the root, it stays (بدء → بدءان). If it marks femininity, it becomes و (صحراء → صحراوان). If it replaces a weak root letter, both are okay (سماءان or سماوان).

3. Pronouns and Verbs:

  • Pronouns: There is no unique 1st-person dual; use نحن (we) for both two people and groups. For the 2nd person, use أنتما, and for the 3rd person, use هما.
  • Verbs: In the past tense, add an alif for masculine (كتبا) or ـتا for feminine (كتبتا). In the present tense, use the suffix ـانِ with the prefix يـ for masculine (يكتبان) or تـ for feminine (تكتبان). Note that the ن is dropped in subjunctive or jussive moods.
  • Word Order: According to verb-first word order, a verb only takes the dual form if it follows the subject. If the verb comes before the dual subject, it remains singular (e.g., وصل الطالبان but الطالبان وصلا).

4. Agreement and Special Rules:

  • Demonstratives: Words like هذا (masculine) and هذه (feminine) change in the dual. Use هذان/هذين for masculine and هاتان/هاتين for feminine.
  • Non-Humans: Unlike plurals, dual non-human nouns always take dual agreement (two books are new = كتابان جديدان).
  • Iḍāfa: If a dual noun is the first part of an Iḍāfa, the final ن is dropped (e.g., مهندسا الشركة).

Examples (4)

  1. رأيتُ الولدينِ في الحديقةِ.

    I saw the two boys in the garden.

    Word by Word: I saw the two boys in the garden.

    In this sentence, 'the two boys' is the object, so it takes the -ayn ending instead of -ān.

  2. كتابا الطالبِ جديدانِ.

    The student's two books are new.

    Word by Word: Two books (of) the student two new.

    When a dual noun is the first part of an Iḍāfa, the final 'n' is dropped from 'kitābāni' to become 'kitābā'.

  3. هذانِ الولدانِ كتبا الدرسَ.

    These two boys wrote the lesson.

    Word by Word: These two the two boys they (dual) wrote the lesson.

    This shows dual agreement: the demonstrative 'hādhāni', the noun, and the past tense verb 'katabā' (adding an alif) all match.

  4. سلمتُ على المعلمتينِ.

    I greeted the two (female) teachers.

    Word by Word: I greeted on the two teachers (fem.).

    After a preposition, the feminine dual noun changes its ending to -tayn.

Common Mistakes

  • Forgetting to change the tāʾ marbūṭa (ة) to a regular 't' (ت) in feminine words.

    سيارةان
    سيارتان

    The 'closed t' (ة) must open into a 'long t' (ت) to connect to the dual suffix.

  • Using a singular adjective with a dual noun.

    كتابان جديد
    كتابان جديدان

    Adjectives must match the noun in number. If the noun is dual, the adjective must be dual too.

  • Using the plural form for two items due to English influence.

    اثنان كتب
    كتابان

    In Arabic, you cannot use the plural form for exactly two things; you must use the dual form.

How It Connects

Tap a pattern to see what it builds on and what it leads to.

ـانLevel 1Two of Something

Learn This First

To form the dual in Arabic, you need to understand the basic concept of number categories (singular vs. dual). You also need to be familiar with the feminine marker (Ta Marbuta) because it changes its shape when the dual suffix is added, and the long vowel Alif which forms the core of the suffix.

Learn Next

Patterns that build on this one.

Words in This Pattern

ان