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课件网) 状语从句 2026年中考英语复习语法专题★★ 时间状语从句 时间状语从句 (1)when“当……的时候”。从句用一般过去时,主句用过去的某种时态；引导的从句可以用延续性动词,也可以用短暂性动词。如：I met him when I was walking in the street.＝I was walking in the street,when I met him. (2)while“正当……时”。引导的从句中,谓语动词必须是延续性动词,且常用进行时。如：My mom was cooking while I was watching TV. (3)as“当……时”,表示一件事情正在发生,另一件事情也在进行中,通常只用于一般过去时。如：He waved as he passed by. (4)as soon as遵循“主将从现”的原则。 如：I will tell you as soon as he comes back. (5)until主句动词为延续性的动词,not…until主句动词为短暂性的动词。如：He stayed(延续性) there until he saw me.＝He didn't leave(短暂性) until he saw me. 【注意】till“直到……”。在大多数情况下,till可以与until互换,但till更口语化,另外till极少用于句首。till也可以与not连用,意为“直到……才”。如： She didn't leave until/till her mother returned.她直到她母亲返回才离开。 (6)before“在……之前”。表示主句的动作发生在从句动词之前。如：Turn off the lights before you leave the room. (7)after “在……之后”。表示主句的动作发生在从句动词之后。如：After the guests left,he began to clean the room. (8)since“自……以来”。主句用现在完成时,从句用一般过去时。如：Our class has planted 20 trees since we joined the “Green School” project. 一、单项填空。 1.(2026·原创)I couldn't unlock my phone I entered the correct password. A.until B.because C.while D.after 2. I finished my online class,I played a short VR game. A.When B.After C.Until D.While A B 3.(2026·原创) the drone flew higher,the view became more amazing. A.Until B.Because C.As D.As soon as 4. the delivery robot arrived,it sent me a message. A.As B.While C.Until D.As soon as 5. she was cooking dinner,her mom was setting the table. A.Before B.While C.Until D.When C D B 二、用括号中所给词的适当形式填空。 1.While he basketball,his smartwatch recorded his heart rate(心率).(play) 2.Before the robot vacuum(真空吸尘器) cleaned the floor,we to pick up toys.(have) 3.As I was reading,the phone .(ring) 4.She the e mail as soon as she finishes her homework.(send) 5.Since the new subway line ,traffic jams have cut down.(open) was playing had rang will send/sends opened 条件状语从句 条件状语从句 (1)unless意为“如果不；除非”,从句用一般现在时,主句通常用一般将来时,即“主将从现”的原则。如：Unless you work hard,you won't succeed.＝If you don't work hard,you won't succeed. (2)if意为“如果”,主从句时态与unless用法一致。如：If you work hard,you will succeed. (3)as long as意为“只要”,遵循“主将从现”的原则。如：As long as he comes,we'll meet him. 【注意】1.条件状语从句遵循“主将从现”的原则,但是如果条件句表达的是普遍真理、客观事实,主从句都用一般现在时。 如： If you heat ice,it melts.如果你加热冰,它就会融化。 2.其他常见结构：①主句＋情态动词(can/may/should 等)：如：If you finish your homework,you can go out.②主句＋祈使句(表示命令或建议)：If you feel tired,take a rest. 单项填空。 ... ...
