•第三章 状语从句 •△ 状语从句讲解△•一、时间状语从句•1 . when , while , as 的特殊点•(1) 表示带有规律性的“每当”或从句和主句的动作存在先后关系时,一般用 when
•(2) 表达“随着”或“一边……一边……”的含义时,一般用 as
•(3)as 作“当……时候”解,从句的谓语一般不可是状态动词
•(4)while 从句的谓语动词不可是短暂性的
•【例 1 】 ________ the days went on , the weather got worse
•A . With B . Since C . While D . As•答案 D•【例 2 】 ________ you are at home alone ,please don't leave the door open
•A . Until B . While C . Before D . As•答案 B •2 .表示“一……就……”的时间状语从句•(1)as soon as 常用一般现在时表将来
•(2)hardly
或 no sooner
结构中,主句谓语用过去完成时,从句谓语用一般过去时
•(3) 表示时间概念的副词充当连词,如: immediately , directly , instantly 等
•(4)“the +瞬间名词”,如: the moment , the minute , the second 等
•【例 3 】 Just use this room for the time being ,and we'll offer you a larger one ________ it becomes available
(2010· 安徽 )•A . as soon as B . unless