in case 做目的状语从句时,从句谓语动词是（should）+V原型

可以是,但不一定
Here's a stick in case you should need it.
给你根木棍, 也许你用得着它.
Be quiet in case you wake the baby.
轻点儿, 别吵醒婴儿.
Keep the window closed in case it rains.
把窗户关好, 以防下雨.
Take warm clothes in case the weather is cold.
穿上暖和的衣服, 以防天冷.
请及时采纳,不懂继续问(天天在线）.(*^__^*) 祝学习进步! 谢谢!