Two Uses of كم
Arabic uses 'kam' in two ways: Interrogative (How many?) and Exclamative (How many a...!). The difference is shown by the noun that follows it.
How It Works
In Modern Standard Arabic, كم (kam) is an indeclinable noun (ism) that appears at the start of a sentence. Its function is determined by the noun that follows it, which acts as an اسم (noun) serving as a clarifying noun.
1. Interrogative Kam (كم الاستفهامية):
Used to ask for a specific quantity. The noun following it must be:
- Singular (never plural).
- In the accusative case (ending in -an).
Note: If a preposition precedes 'kam' (e.g., بكم), the noun can be either accusative or genitive. In writing, this form typically ends with a question mark (؟).
2. Exclamative Kam (كم الخبرية):
Used to express 'so many' or 'how many a...' in a rhetorical or literary sense. It does not seek an answer. The noun following it must be:
- Singular or Plural.
- In the genitive case.
- Often introduced by the preposition من (min).
In writing, this form typically ends with an exclamation mark (!). This form is common in formal literature, the Quran, and high-level prose to emphasize frequency or greatness.
Examples (5)
- كم كتاباً قرأتَ هذا الشهر؟
How many books did you read this month?
Word by Word: How many book you-read this month?
Interrogative: The noun 'kitāban' is singular and accusative.
- كم بطلٍ ضحّى بنفسه من أجل الوطن!
How many a hero has sacrificed himself for the nation!
Word by Word: How many hero sacrificed with-self-his from sake the-nation!
Exclamative: The noun 'baṭalin' is singular and genitive, expressing a large number of heroes.
- كم من كتبٍ قرأتُ ولم أستفد منها!
How many books I have read without benefiting from them!
Word by Word: How many from books I-read and-not I-benefit from-them!
Exclamative: Uses 'min' followed by a plural genitive noun to show abundance.
- بكم درهمٍ اشتريتَ هذا؟
For how many dirhams did you buy this?
Word by Word: With-how-many dirham you-bought this?
Interrogative with preposition: Because 'bi-' precedes 'kam', the noun 'dirhamin' can be genitive.
- كم مدينةً زرتَ في حياتك؟
How many cities have you visited in your life?
Word by Word: How many city you-visited in life-your?
Interrogative: Even though the English translation is plural, the Arabic noun 'madīnatan' must be singular.
Common Mistakes
Using a plural noun for a literal question.
كم كتباً قرأتَ؟كم كتاباً قرأتَ؟In the interrogative form, the noun must always be singular, even if you expect the answer to be a large number.
Using the accusative case for the exclamative form.
كم بطلاً ضحى بنفسه!كم بطلٍ ضحى بنفسه!Using the accusative '-an' makes it a literal question ('How many heroes...?'). To express exclamation, use the genitive case.
How It Connects
Learn This First
To distinguish between the two uses of 'kam', a learner needs to understand the basic interrogative 'kam' and how case endings (specifically the accusative for questions and genitive for statements) function to change the meaning of the sentence.
- The Clarifying Noun
Both types of 'kam' rely on the concept of 'tamyiz' (the clarifying noun) to specify what is being counted or marveled at.
Level 3 - The Ending After Prepositions and Joined Nouns
Understanding the genitive case is essential because 'kam al-khabariyya' (the exclamatory 'kam') typically takes a noun in the genitive case.
Level 2
Related Patterns
- كم + Accusative Singular NounHow Many Takes a Singular Noun
This is the specific pattern for the interrogative use of 'kam'.
Level 2 - كم (الخبرية)So Many
The exclamative 'kam' is a primary tool for expressing wonder or abundance in formal Arabic.
Level 4 - The Object Ending
The interrogative 'kam' requires the noun to be in the accusative case.
Level 2 - Question Words Come First
Like all question words, 'kam' must appear at the beginning of the sentence.
Level 1
Words in This Pattern
Practice Two Uses of كم in Bubblegum
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