完整高中英语状语从句讲解及练习VIP免费

１状语从句在复合句中作状语，位置灵活。状语从句可分为时间状语从句，目的状语从句，条件状语从句，让步状语从句，地点状语从句，原因状语从句，方式状语从句，结果状语从句。（一）时间状语从句1.when, as, while a.when 表时间，从句既可以用延续性动词，又可以用瞬间动词。Eg: When I get there I will call you. 如果 when 引导的时状的主语与主句的主语相同，而从句的谓语又是be 动词时，那么从句中的主语与be可省。Eg：When （ you are）in trouble, you can ask her for help. 如果 when 引导的时状的主语与主句的主语相同时，往往可以用“when+分词”的形式代替该状从。Eg：When I came into the room(When coming into the room), I found the light was off. b.while 表时间，从句需用延续性动词，或者主句的动作发生在从句的动作进行过程中。主句的谓语动词通常是非延续性动词。Eg: He came in while I was reading a book. I met her while I was in school. c. as表时间，与when 相似，但侧重强调主从句动作同在时间点或同时间段进行。同时可表示主句的动作随着从句的动作的变化而变化。Eg: He jumps as he sings. As the wind rose, the noise increased. 2.before(在⋯⋯ 之前 )与 after（在 ⋯⋯ 之后）Eg：See me before you leave. I saw them after I arrived. 3. till 与 until 肯定形式表示的意思是"做某事直至某时"。否定形式表达的意思是"直至某时才做某事"。Eg: Wait till/untill I call you. 等着直到我叫你。She didn't arrive till/until 6 o'clock..她直到 6 点才到但是置于句首时只可用untill. Until you told me, I had heard nothing of what happened. 直到你告诉我以前，出了什么事我一点也不知道。否定形式有另外两种表达方式：(1)Not until ⋯在句首，主句用倒装。Man did not know what heat was until the early years of the 19th century. =Not until the early years of the 19th century did man know what heat was.(2)It is not until ⋯ that⋯He will not go to bed until his mother comes home. =It is not until his mother comes home that he will go to bed. 4. as soon as/the moment/the...