а да не

The compound conjunction а да не (or (а) да + negated verb) introduces an adverbial clause of manner expressing an absent accompanying circumstance (начинска реченица са значењем одсуства пратеће околности), translating to 'without doing something' in English.

1. Conjunction Structure '(а) да' vs. Purpose 'да не':
Standard Serbian descriptive grammars classify this connective as (а) да. While modern standard usage strongly favors prefixing а for clarity and stylistic flow, the initial а is facultative (e.g., Отишао је, да се није поздравио is grammatical in traditional prose, though а да се није поздравио is much more customary today). In contrast, purpose clauses cannot take the past tense (перфекат), whereas absent-circumstance clauses freely combine with past forms to describe realized, unperformed actions.

2. Finite Verb Requirement and Tenses:
Within this conjunction pattern, Serbian requires a fully conjugated finite verb, unlike the English preposition + gerund construction:

• Present Tense: Used for general truths, simultaneous states, and hypothetical, modal, or prospective contexts, frequently using the perfective present (e.g., Не можеш ући а да не платиш; Ништа се не би десило а да он то не сазна). Note that conditional forms are avoided here, as (а) да не би typically introduces a negative purpose clause ('in order not to / lest') rather than an absent circumstance.
• Past Tense (перфекат): Used when referring to realized past events that unfolded without an accompanying action (e.g., Отишао је, а да се није поздравио; ...а да му нико није прегледао ствари).

3. Clause Order and Postposition:
Unlike English 'without...' constructions, which can freely stand before the main clause, the Serbian а да clause cannot appear in sentence-initial position (*А да се није поздравио, отишао је is unacceptable). It must always follow the main clause or be parenthetically inserted within it.

4. Word Order and Enclitics:
Pronominal and reflexive clitics (short pronouns, се) typically take the second position in the clause directly following the conjunction particle да, appearing ahead of the negated verb or negative auxiliary:

• ...а да се не окрене (not: *...а да не окрене се)
• ...а да му га нису вратили

However, clitic placement is relative to the first accented constituent in the clause, not an inflexible rule tied solely to да. Fully stressed words—such as an overt subject pronoun or focused constituent—can precede the clitic cluster:

• ...а да он то не сазна (where the tonic pronoun он precedes the clitic то)

5. Negative Concord:
Whenever indefinite pronouns or adverbs appear in this clause, mandatory negative concord applies: words like ико, ишта, or икада must take their negative forms нико, ништа, and никада alongside the negated verb (e.g., Ушао је, а да га нико није приметио).

6. Stylistic Alternatives and Pitfalls to Avoid:

• Verbal Adverb: When both actions share the identical subject, standard Serbian stylistically favors a negated verbal adverb (глаголски прилог садашњи or глаголски прилог прошли), e.g., Отишао је не рекавши ништа alongside Отишао је, а да ништа није рекао.
• Avoiding Barbarisms: Prescriptive grammars reject the literal calque *без да + verb (borrowed from German ohne dass). The preposition без governs a noun in the genitive; subordinate clauses expressing absent accompaniment must always use (а) да не.