in case 1. 假使 In case he comes, let me know. 如果他来的话,告诉我一声。 2. 免得;以防;以防万一 Be quiet in case you (should) wake the baby. 轻点儿,免得弄醒孩子。 Keep the window closed in case it rains. 把窗子关好,以防下雨。 It may rain; you'd better take an umbrella in case. 可能要下雨;你最好带把伞,以防万一。 3. 也许,说不定 Wait outside in case you can be useful. 等在外面,也许你可以帮点儿忙。 Take your skates in case you decide to go skating. 把冰鞋带去,说不定你们会要滑冰呢。