in case引導目的狀語從句：
(1)He takes a torch in case it gets dark before he returns. 他帶了手電筒，以備天黑以后回家之用。
(2)I decided to stay at home just in case my friends came round. 我決定留在家里，以防朋友們不期而至。
(3)I'll make some sandwiches in case you feel hungry on the journey. 我會做些三明治，免得你在旅途中餓著。
in case引導條件狀語從句：
(1)In case we fail，we won't lose heart. 萬一我們失敗，我們決不會失去信心。
(2)Add more coal in case the weather is cold. 如果天氣冷，就添些煤吧。
(3)In case you get home before I do，could you start preparing dinner? 如果你在我之前到家，你能不能動手做飯？