表示目的状语的从句可以由that, so that, in order that, lest, for fear that, in case等词引导,例如: You must speak louder so that /in order that you can be heard by all.来源:www.examda.com He wrote the name down for fear that(lest) he should forget it.来源:www.examda.com Better take more clothes in case the weather is cold.