Unit 10 第三课时 (Grammar Focus 3c)—单元同步语法精讲精练（作业课件）-【原创新课堂】2022-2023学年八年级英语上册（人教新目标版）河南

原创新课堂 英语八年级上册人教版 第三课时(Grammar Focus-3c) 一单元同步语法精讲精练 f导的条件状语从句 含义：引导的从句在复合句中表示条件，作主句的条件状语，称为条件状 语从句，表示假如从句的动作发生，主句的动作就（不会发生。 条件状语从句的引导词：条件状语从句通常由连词if(如果；假如，unless(= if.not除非；如果不引导。 eg:You will get good grades if you study hard.如果你努力学习，就会取得好成 绩。 You will achieve nothing unless you work hard. =You will achieve nothing if you don't work hard..如果你不努力工作，将一事无 成。 条件状语从句的位置：条件状语从句位置灵活，可放在主句之前，但要用 逗号隔开；也可放在主句之后。 ·条件状语从句的时态：当主句为以下三种情况时，条件状语从句用一般现 在时表示将来： ①当主句为一般将来时时： eg:If you don't hurry up,you''ll miss the train.如果你不快点儿，你将错过 火车。 ②当主句的谓语中含有can,may,must等情态动词时； eg:We must study hard if we want to pass the exam.如果想通过考试我们必 须努力学习。 ③当主句为祈使句时。 eg:Have a good rest if you are tired..如果累了，你就好好休息一下。 【拓展】①为避免重复，条件状语从句常用助动词do(does,did)来替代上文 所提到的动作。 ②if还可表示“是否”，相当于whether,主要用于宾语从句。 eg:I don't know if he will come tomorrow.If he comes,I will tell you. 道他明天是否会来。如果他来了，我就会告诉你。（前一个f表示“是否”，后一 个if表示“如果”。) 一、根据句意，用括号中所给单词的适当形式填空。 1.If Nick drinks (drink)too much coffee,he will feel ill. 2.If it doesn't rain(not rain)this afternoon,we will play soccer. 3.If you go to the beach,you will have (have)fun. 4.You must stop if the traffic light is (be)red. 5.If you want me to be nice to you,be(be)nice to me. 6.There will be (be)many visitors in the mountains if it is fine. 7.If you have an exam,don't go (not go)to the party! 8.They will go (go)to the cinema with us if they leave (leave)work early 二、按要求完成下列句子。每空一词。 9.Exercise more,and you will become healthier..(改为同义句) fyou exercise more,you will become healthier. If l0.It won't rain on Sunday.We will go riding..(用if合并为一句) If it doesn't rain on Sunday,we will go riding. ll.If you don't tell us your problems,we can't help you.(改为同义句 We can't help you unless you tell us your problems. l2.Come to see me,and I will help you solve the problem.(改为同义句) I will help you solve the problem if you come to see me. l3.Say sorry to your sister,or she won't forgive(原谅)you.(改为同义句) If you don't say sorry to your sister,she won't forgive you. 一、根据句意，选择方框中的单词并用其适当形式填空。每词限用一次