при(should adverse developments occur – при наступлении неблагоприятных обстоятельствStas-Soleil); бы; б; в том случае, если(При использовании как замена союзу-связке "если". При этом понижается вероятность события, следующего по тексту далее. bloomberg.comLinguaer); в случае если(should a user express the wish toABelonogov)
на тот случай, если(For example, why was the plane carrying 24 fully armed rockets on what was essentially a training exercise? Although skeptics to the UFO claims – which we will get to in a moment – point out that this is to produce the realistic weight of a plane should it be heading into combat – this would appear to be something achievable without using fully armed weaponry. Certainly not with an inexperienced pilot, if we accept for a moment the US Air Force’s claims regarding Barlow and his error causing the crash. -- на тот случай, если ему придётся вылететь на боевое задание (ufoinsight.com) • The fact that Allan used a pen name proves that he did not feel great confidence about his novel and wanted to be able to maintain a distance from it should it be poorly received by critics.ART Vancouver)
если вдруг(При использовании как замена союзу-связке "если". При этом понижается вероятность события, следующего по тексту далее • To give the world enough notice should Iran make a dash for the bomb.bloomberg.comLinguaer)
в случае(The word should is commonly used in a professional context with this future form of conditional sentence in place of if. This conveys a more reserved and formal impression to the reader or listener. Thus: Should you encounter any further difficulties in the future please inform me. The word should is also used in a professional context in place of the word would in other present or future forms of conditional sentences. Thus • I should also make clear that this offer is conditional upon early acceptance.Alexander Demidov)
bloomberg.com Linguaer); в случае если (should a user express the wish to ABelonogov)