2024年中考英语二轮复习学案 状语从句

状语从句 状语从句是指句子作状语时,起副词作用的句子。状语从句可以修饰主句中的形容词、动词、副词或整个句子。状语从句根据其用途可分为时间状语从句、条件状语从句、原因状语从句、目的状语从句、结果状语从句、让步状语从句、比较状语从句、地点状语从句和方式状语从句等。 注意:状语从句与主句连接,位于句首时,常用逗号与主句分开,位于句末时,其前一般不用逗号。 I. 时间状语从句 1) 时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。例如: It was raining hard when got to school yesterday. While he was doing his homework, the telephone rang. As he walked along the lake, he sang happily. He had learned a little Chinese before he came to China. After he finished middle school, he went to work in a factory. 易混引导词while, when的区别: when既可以指"时间点",与瞬间动词连用,也可以指"时间段",与延续性动词连用(=while)。 while表示时间段,因此,while 从句的谓语动词要用延续性动词。 when引导的时间状语从句多用于一般时态,while引导的时间状语从句多用于进行时态。 练习:用while或when填空 1. Please don't talk so loud _ others are working. 2. _ he came in, his mother was cooking. 3. _ we were at school, we went to the library every day. 2) 在时间状语从句里,通常不用将来时态,用现在时态表示将来的动作或状态。 练习: 1. I’ll ring you up as soon as I _(get)to New York. 2 .I will tell him everything when he _ (come) back. 3. He won’t believe it until he _ (see) it with his own eyes. II.条件状语从句 1)条件状语从句通常由if, unless引导。例如: Don’t leave the building unless I tell you to. 2) 在条件状语从句里,谓语动词通常用现在时态表示将来的动作或状态。 练习: 1. I’ll help you with your English if I _(be) free tomorrow. 2. He _(not) be late unless he is ill. 3) “祈使句 + and (or)+ 陈述句” 在意思上相当于一个带有条件状语从句的复合句。例如: Hurry up, or you’ll be late. =If you don’t hurry up, you’ll be late. Study hard and you will pass the exam.=If you study hard, you will pass the exam. III.原因状语从句 1)原因状语从句通常由because, since(因为), as(因为)引导。例如: He didn’t come to school because he was ill. As it is raining, we shall not go the zoo. Since you can’t answer the question, I’ll ask someone else. 2)because表示直接原因,语气最强。Because引导的原因状语从句多放在主句之后。回答由why提出的问题 只能用because。As和since语气较弱,一般用来表示明显的原因。由as和since引导的原因状语从居多 在句首。例如: -Why aren’t going there? -Because I don’t want to. As he has no car, he can’t get there easily. Since we have no money, we can’t buy it. 3) because和so不能同用在一个句子里。 IV.结果状语从句 1) 结果状语从句由s