状语从句(课件PPT)-【练客中考】2024年新疆中考英语总复习新思路

状语从句 教师点拨 考点精讲 1　时间状语从句 状语从句的结构(以when为例)： 1．When＋从句(，)＋主句　2.主句(，)＋when＋从句 一、连词：when, while, as, before, after, till, until, since, as soon as等。 二、when 与while的区别： when＋短暂性动作(常为一般时)或延续性动作(常为进行时)；while＋延续性动作(常为进行时)。如： When I stopped my car, a policeman came up to me. My wife was cooking when I got home. I was doing my homework when/while my father was watching TV. While/When we were talking, the teacher came in. LOGO 教师点拨 三、till, until用法： 既可以用于肯定句也可用于否定句，可以互换。如： I stayed there till/until I was asked to leave. I didn't leave till/until I was told to. 四、since一般用于完成时。如： I haven't got in touch with my parents since I parted with them in April. She has worked here since she came to Guangdong three years ago. LOGO 教师点拨 五、如果主句是将来时、祈使句或者表将来的情态动词句时，从句用一般现在时，有时可用现在完成时，即所谓的“主将从现”的原则。如： Don't get off the bus until the bus has stopped/stops. I will write to you as soon as I arrive/have arrived. Can you send me an e­mail when you get home? 注意：while还可以用来表达对比(不是时间状语从句)。 My sister likes math while I am fond of English.(相当于并列句中的and或but) Tom is good at the piano while Sam(is good at)the violin. LOGO 教师点拨 考点精讲 2　原因状语从句 连词：because, since, as等。 because表示很强的原因；since/as表示较弱的、不直接的原因，可以译成“既然”。 I am worried now because I have left my homework at home. Since everyone is here, let's start our meeting. As you don't feel well, let's stay at home today. 注意：because不与so连用。 LOGO 教师点拨 考点精讲 3　条件状语从句 一、连词if, unless(＝if...not), as long as(只要)。 二、一定要遵循“主将从现”的原则。如： We will go for a picnic if it is fine tomorrow. You won't improve your study unless you work hard. ＝You won't improve your study if you don't work hard. You will achieve your dream as long as you stick to it. LOGO 教师点拨 考点精讲 4　让步状语从句 连词：though, although, even though 注意：不与but连用。 He came to see me in such hot weather although he is busy. LOGO 教师点拨 考点精讲 5　目的状语从句 连词：so that, in order that等。目的状语从句常是情态动词句。 Speak clearly so that/in order that they can understand you. I got up at 5：00 so that/in order that I could catch the first bus. 当主句语从句主语相同时，从句还可改成