Questions
Yes/no questions are marked by a particle or just intonation. Content questions use a fixed set of question words that change between MSA and dialect.
Asking questions in Arabic is mechanically simpler than in English. There is no equivalent of "do" or "did" — you don't restructure the sentence the way you do in English ("Did he go?" from "He went"). Instead, you either prefix a small particle to a perfectly ordinary sentence, or, in dialect, you just use rising intonation. Content questions ("what," "where," "when") use a small set of words placed at the start of the sentence. The MSA forms are uniform across the Arab world; the dialect forms vary.
Yes/no questions
To turn a statement into a yes/no question in MSA, prefix one of two particles: hal (the more common, neutral choice) or a- (slightly more formal or rhetorical, attached as a prefix).
In dialect, both particles are usually skipped. A statement becomes a question by intonation alone:
The MSA question words
The classical set, used in writing and formal speech across the Arab world:
Question words in context
Dialect equivalents
The MSA words are universally understood, but in spoken Arabic each region has its own set. Two of the most influential — Egyptian and Levantine — show a useful sample of how the words shift.
Why English speakers find this easy — and where they slip
Question formation is one of the easiest parts of Arabic grammar. There is no auxiliary "do," no inversion of subject and verb, and the question word goes at the front much as it does in English. The slips are at the lexical level: choosing maa versus maadhaa, or memorising the dialect set you actually need. The kam construction is also tricky — it takes a singular noun in the accusative, not a plural, which surprises English speakers.
What it's called in the Arabic tradition
An interrogative is اِسْتِفْهام (istifhaam) and the question particles are حُروف الاِسْتِفْهام (Huruuf al-istifhaam) — hal and a-. The question words themselves are أَسْماء الاِسْتِفْهام (asmaa' al-istifhaam, "the nouns of interrogation") — they are classified as nouns in the Arabic tradition because they take case endings and play noun-like syntactic roles in the sentence.