English freely leaves a preposition at the end of a question or relative clause: “Who did you speak to?” and “the issue we spoke about.” Formal contemporary Modern Standard Arabic normally builds these clauses differently. The preposition travels with an interrogative expression, or it keeps an attached pronoun that points back to the relative antecedent.
This is not a claim that no Arabic variety ever produces anything resembling stranding. Colloquial contact patterns, repairs in spontaneous speech, and deliberately elliptical headlines can depart from the formal norm. For reliable edited MSA, however, treat a preposition as needing an overt complement: a noun, an interrogative, a relative phrase, a clause, or an attached suffix.
If the underlying verb–preposition pairing is unfamiliar, first review Verb–Preposition Government. The complete suffix paradigms are collected under Pronoun Suffixes after Prepositions.
Questions: front the whole prepositional phrase
When the questioned constituent is the complement of a preposition, place the preposition before من “who” or ما “what.” English moves only the interrogative and leaves the preposition behind; Arabic moves the complete prepositional phrase.
إلى من أرسلت النسخة النهائية؟
ʾilā man ʾarsalta n-nuskhata n-nihāʾiyya?
To whom did you send the final copy? (Addressing one man.)
عن أي موضوع تحدث الضيف؟
ʿan ʾayyi mawḍūʿin taḥaddatha ḍ-ḍayf?
What topic did the guest speak about?
في أي قاعة سيعقد الاجتماع؟
fī ʾayyi qāʿatin sayuʿqadu l-ijtimāʿ?
In which hall will the meeting be held?
The noun after أيّ is genitive because the entire interrogative phrase is governed by the preposition: عن أيِّ موضوعٍ and في أيِّ قاعةٍ. In normal unvocalized writing the endings disappear, but the syntax does not.
With ما, several common prepositions form conventional written contractions. The alif of ما is deleted: بمَ، لمَ، فيمَ، عمَّ، ممَّ، إلامَ، علامَ. Some editorial styles retain a visually fuller spelling in less lexicalized contexts, but these contracted question forms are standard (formal).
بم تفكر قبل اتخاذ القرار؟
bima tufakkiru qabla ttikhādhi l-qarār?
What are you thinking about before making the decision?
إلام تشير هذه الأرقام؟
ʾilāma tushīru hādhihi l-ʾarqām?
What do these figures point to?
Relative clauses: keep a resumptive suffix
In the default MSA relative construction, a preposition inside the relative clause carries an attached pronoun agreeing with the antecedent. The suffix is called resumptive because it resumes, or represents, the antecedent in the position where the prepositional complement belongs.
هذا هو التقرير الذي أشرت إليه في الاجتماع.
hādhā huwa t-taqrīru lladhī ʾashartu ʾilayhi fī l-ijtimāʿ.
This is the report that I referred to in the meeting.
وجدنا الشقة التي كنا نبحث عنها.
wajadnā sh-shaqqata llatī kunnā nabḥathu ʿanhā.
We found the apartment that we had been looking for.
هذه هي المبادرات التي يعتمد عليها البرنامج.
hādhihi hiya l-mubādarātu llatī yaʿtamidu ʿalayhā l-barnāmaj.
These are the initiatives on which the program depends.
Notice عليها, not عليهن, with a non-human plural antecedent. In MSA, non-human plurals normally trigger feminine-singular agreement and reference. A human plural takes a plural suffix: الموظفون الذين تحدثت معهم “the employees I spoke with.”
الموظفون الذين تحدثت معهم أيدوا الاقتراح.
al-muwaẓẓafūna lladhīna taḥaddathu maʿahum ʾayyadū l-iqtirāḥ.
The employees whom I spoke with supported the proposal.
English speakers sometimes feel that the suffix repeats information. Arabic uses that repetition to make the relative clause structurally complete. Omitting it after the preposition does not create the ordinary formal equivalent of English stranding.
Formal fronting and pied-piping
Arabic can also front a complete prepositional phrase for contrast, topic continuity, or a highly formal relative style. This is genuine pied-piping: the preposition remains together with its complement.
إلى هذه النتيجة توصلت اللجنة بعد أشهر من التحقيق.
ʾilā hādhihi n-natījati tawaṣṣalati l-lajnatu baʿda ʾashhurin mina t-taḥqīq.
It was this conclusion that the committee reached after months of investigation. (Formal, contrastive fronting.)
الأسباب التي من أجلها تأجل التصويت ما زالت قائمة.
al-ʾasbābu llatī min ʾajlihā taʾajjala t-taṣwītu mā zālat qāʾima.
The reasons for which the vote was postponed still remain. (Formal.)
الجهة التي إليها يرسل الطلب محددة في النموذج.
al-jihatu llatī ʾilayhā yursalu ṭ-ṭalabu muḥaddadatun fī n-namūdhaj.
The body to which the application is sent is specified on the form. (Highly formal administrative style.)
The last order is grammatical but marked. Ordinary formal prose usually prefers الجهة التي يرسل الطلب إليها, with the preposition later in the relative clause. By contrast, من أجلها often fronts naturally because the whole complex expression functions as a focused reason phrase.
Spatial, temporal, and abstract complements
The same structural principle applies across meanings. A spatial relation keeps its locative complement, a temporal relation keeps its time complement, and an idiomatic verb keeps the preposition selected by its lexical frame.
هذه هي القرية التي مررنا بها قبل غروب الشمس.
hādhihi hiya l-qaryatu llatī mararnā bihā qabla ghurūbi sh-shams.
This is the village that we passed through before sunset. (Spatial.)
كان الصيف هو الفصل الذي نسافر فيه عادة.
kāna ṣ-ṣayfu huwa l-faṣla lladhī nusāfiru fīhi ʿāda.
Summer was the season in which we usually traveled. (Temporal.)
هذه قضية لا يمكن التهاون فيها.
hādhihi qaḍiyyatun lā yumkinu t-tahāwunu fīhā.
This is an issue that cannot be treated lightly. (Formal abstract frame; English uses no equivalent of في.)
In the final sentence, تهاون في is a lexical construction. English wording cannot tell you whether Arabic requires في, إلى, لـ, or a direct object. The no-stranding pattern preserves whichever frame Arabic actually selects.
Common Mistakes
Leaving the preposition without a complement
❌ هذا هو الملف الذي كنت أبحث عن.
Incorrect in edited MSA—عن needs a resumptive suffix referring to الملف.
✅ هذا هو الملف الذي كنت أبحث عنه.
hādhā huwa l-malaffu lladhī kuntu ʾabḥathu ʿanh.
This is the file that I was looking for.
Copying English question order
❌ من تحدثت مع؟
Incorrect in formal MSA—the preposition cannot be stranded after the verb.
✅ مع من تحدثت بعد الاجتماع؟
maʿa man taḥaddatha baʿda l-ijtimāʿ?
Who did you speak with after the meeting? (Addressing one man.)
Selecting a preposition from the English gloss
❌ هذه هي الرسالة التي أجبت إليها.
Incorrect—Arabic أجاب governs عن for the question or message answered.
✅ هذه هي الرسالة التي أجبت عنها.
hādhihi hiya r-risālatu llatī ʾajabtu ʿanhā.
This is the message that I replied to.
Using the wrong case after a fronted preposition
❌ عن أي موضوع، مع نطق موضوع بالضمة، تحدث الضيف؟
Incorrect in fully inflected Arabic—عن governs genitive أيِّ موضوعٍ.
✅ عن أي موضوع تحدث الضيف؟
ʿan ʾayyi mawḍūʿin taḥaddatha ḍ-ḍayf?
What topic did the guest speak about?
Detaching a one-letter preposition
❌ ب من اتصلت؟
Incorrect spelling—one-letter بـ attaches to the following word.
✅ بمن اتصلت أولا؟
biman ittaṣalta ʾawwalan?
Whom did you contact first? (Addressing one man.)
Key Takeaways
- In formal MSA questions, front the complete prepositional phrase: إلى من، مع من، في أيّ قاعة.
- In ordinary relative clauses, keep the preposition and add a resumptive suffix: التقرير الذي أشرت إليه.
- Marked fronting such as الجهة التي إليها يرسل الطلب is possible, but it is not the neutral default.
- Preserve the Arabic lexical frame and genitive government; never choose a preposition merely from the English wording.
Now practice Arabic
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning Arabic →Related Topics
- Adjective and Participle GovernmentB1 — Use the prepositions selected by Arabic adjectives and participles, including راغب في، قادر على, and their clitic complements.
- Compound Prepositional PhrasesB1 — Use multiword relations such as بالنسبة إلى، من أجل، بسبب، and على الرغم من with their exact spelling and internal government.
- Verb–Preposition GovernmentB1 — Learn Arabic verbs together with their selected prepositions, meaning shifts, object types, and attached-pronoun forms.
- Pronoun Suffixes after PrepositionsA2 — Attach pronoun complements to Arabic prepositions while choosing the base changes required by bi-, li-, maʿa, ʿinda, min, and ilā.
- في — in, at, and withinA1 — Use في for containment, settings, time frames, abstract domains, governed complements, and attached pronouns.