职称英语理工类语法词汇常见考点：目的状语从句

　　四.目的状语从句

　　I) so that, in order that和in case, lest 等引导的目的状语从句

　　so that , in order that 常与may, can, could, might等情态动词连用

　　In order that he shouldnt wake up his wife, he came in quietly.

　　Ⅱ) in case, lest 引导的目的状语从句多用虚拟语气结构：should + v. 原形，意为以防、以免。 例如：

　　He ran away lest he be caught.

　　I hid the book in case she should see it. 我把书藏起来，以防被她看到