2015年12月英语四级语法复习：目的状语从句思维导图

可以由that，sothat，inorderthat，lest，forfearthat，incase等词引导;

lest：以防，从句中的谓语动词必须用should+动词原形;

eg:Hewrotethenamedownforfearthat(lest)heshouldforgetit.

incase：以防，与lest不同，从句里的时态不做特殊变化;

eg：Taketheumbrellawithyouincaseitrains.

forfeatthat：和lest保持一致;

eg：Avarietyofactivitiesshouldbeorganizedsothatparticipantscanremainactiveaslongastheywantandthengoontosomethingelsewithoutfeelingguiltyandwithoutlettingtheotherparticipantsdown.

let…down…：让……感到气馁。