au cas où

== French == === Pronunciation === IPA(key): /o ka u/ ~ /o kɑ u/, /o ka.z‿u/ ~ /o kɑ.z‿u/ === Conjunction === au cas où in case (+ conditional or subjunctive) Synonyms: au cas que, en cas que ==== Usage notes ==== Traditionally and according to the prescription of the Académie française, the following verb should be in the conditional mood: au cas où il pleuvrait ― in case it rains However, in modern informal language, the verb is sometimes found in the subjunctive mood, though the conditional remains more common: au cas où il pleuve ― in case it rains === Adverb === au cas où just in case