3.Unit 8 第三课时 Grammar Focus（3a-3c）（作业课件）-【优翼·学练优】2025-2026学年新教材八年级英语上册同步备课（人教版2024）

优翼 优翼 学练优八年级英语上 优翼 第三课时 Grammar Focus(3a~3c) 优翼 11语法精讲1 如果主句为 从句通常用一般现在时。如： If it snows tomorrow,we will make a snowman. 当主句中含有can、may、must等情态动词时，从句常用一般现在时。如： If your father keeps on drinking,it may be harmful to his health. 用法 当主句为 时，从句也常用一般现在时。如： Please take a walk outside if it's sunny tomorrow. 当表达客观事实、普遍真理时，主句和从句都用 如： if引 If you heat ice,it turns into water. 导的 条件 f引导条件状语从句时，原来的句子可以转换为“祈使句+and/or+简单句”。其中and 状语 表示顺承，or表示转折，意为“否则”。如：If you don'tfollow me,you'll get lost in 从句 the forest.=Follow me,or you'll get lost in the forest. 借助with或without来转换条件状语从句。如：If you help me,I will solve the problem 同义句 soon.=With your help,I will solve the problem soon. 转换 if.not.引导的条件状语从句用连词unless>来转换。如：You will be late if you don'tgo there by subway.=You will be late unless you go there by subway. 优翼 11语法精练I0 [,根据句意用括号内所给单词的适当形式填空。 1.If it not snow)tomorrow,Bob (play)football with me. 2.Please wake me up if Susan (come). 3.Don't lose heart.If you keep working hard,you (make）it some day. 优翼 4.I would like to have a talk with you if you be)free after the meeting. 5,If Tom i（go）to Beijing by train,he will try silent carriages(静音车厢). 6.If you put a lot of sugar in water,it (taste) sweet, 7.If a person eats too much junk food,he usually (feel)bad. 优翼 Ⅱ.按要求完成句子，每空一词。 1.If you study hard,you will pass the exam.（改 为同义句) Study hard,or you 2.If Tony doesn't help me,I can't catch up with others..（改为同义句) I can't catch up with others 优翼 Ⅲ. 微语篇练语法 根据短文内容，用方框中所给单 词的适当形式填空。 go,worry,call,have,take Dear Jane, I don't know if I should go to the famous concert next Saturday.I want to tell my parents, but I'm afraid they won't agree.If I don't tell 优翼 them,they 1. about me.What's more, if I 2.to the concert with my friends,I will not have enough time to do my homework.If I don't finish my homework,Mr Li 3. my parents and tell them about that.Also,I'm not 优翼 sure how to get to the concert.If I 4.a bus, I will be late.If I take a taxi,I 5. little money for lunch.But the concert is really exciting.What should I do?Can you give me some advice? Li Hua 优翼 11课时精练10 I.根据句意用方框中所给单词的适当形式填空。 detail,reunion,meeting,serious,training 1.Our at the library was a pleasant surprise. 2.To achieve our dreams,we must take every life choice