Unit 7 The secret of memory Grammar 课件- 2025-2026学年沪教版八年级英语上册

该初中英语课件聚焦条件句（可能结果与必然结果）及unless用法，通过复习“主将从现”“主祈从现”等已学规则，衔接必然结果的“主现从现”，再引入unless与if…not的转换，构建从已知到未知的学习支架。 其亮点在于分层练习与思维培养结合，标注语法规则的选择填空（如“主将从现”实例）、情境化转换练习（如“除非睡眠充足，否则记不住东西”）提升语言运用能力，对比if…not与unless异同培养分析思维，自评与生活实例作业促进自主学习。学生能提升语法应用与逻辑表达，教师可借助系统资源高效教学。

广州市增城区华大彦宏学校 上课教师：石国辉 Unit 7 The secret of memory Grammar 1 Learning objectives By the end of the lesson, I will be able to... 1 2 3 Master the structure and usage of conditional sentences to talk about certain results (both verbs in simple present); Use conditional sentences and unless to rewrite sentences and express logical relationships accurately; Understand the relationship and usage between if…not and unless. review: conditional sentences 条件句 We have already learnt to use ___ _______ to talk about probable results. We can also use _________ _______ to talk about results that will certainly happen. conditional sentences conditional sentences (1) if 从句用 ___________,主句用__________， 用来描述将来的情况。 (2) 如果主句是祈使句，那么从句通常用一般现在时 (3) 如果主句含有情态动词，从句用一般现在时 (4) 如果在某种条件下，某事必然会发生，则应用 一般现在时 一般将来时 （主现从现） （主将从现） （主祈从现） （主情从现） I can sum up: review: 1. If you ____ to the party, you ____ a great time. A. will go; will have B. go; have C. go; will have D. will go; have 2. I’ll give the book to him if he ____ here next Sunday. A. will come B. comes C. is coming D. came 3. If you ____ the cup, it ____ into pieces. A. drop; will fall B. will drop; falls C. will drop; will fall D. drop; falls 4. If I find your dog, I _____ you a call. A. give B. gave C. giving D. will give 5. Mr Brown will come to our party if he ____ too busy tomorrow. A. is B. isn’t C. will be D. won’t be 主将从现 主将从现 主现从现 Exercise: 主将从现 主将从现 6. If you free, please come here tomorrow. A. was B. will be C. were D. are 7. Ice into water faster if we some salt onto it. A. will turn; will put B. will turn; are putting C. turns; put D. turns; will put 8. Don’t worry, she you a call if she Beijing. A. gives; reaches B. will give; will reach C. will give; reaches D. gives; will reach 9. There 29 days in February if it a leap year(闰年). A. will be; is B. will be, will be C. are; will be D. are; is 10.She will come to help us if she _____ free time tomorrow. A.have B. will have C.has D.had Exercise: 主祈从现 主现从现 主将从现 主现从现 主将从现 11. We won’t go out if it ____ tonight. A. rain B. will rain C. is raining D. rains 12. If you _____ to join an educational exchange, you must apply for it first. A. want B. wanted C. wants D. wanting 13. — You won’t pass the quiz ___ you don’t study hard for it. — OK. I’ll try my best. A. and B. unless C. if D. but 14. — Great news! The TFBOYS will come to our city next week! — Really? ____ they come, my brother will be very happy. A. Unless B. If C. Before D. So 15. Mike, you can’t go out ________ you finish all your homework today. A．when B．if C．because D．unless Exercise: 主将从现 主情从现 主将从现 主将从现 unless 英 [ʌn'les] conj. 除非，如果不 条件状语从句：unless 从句遵循if从句主将从现、主祈从现和主情从现的情况。 If you don’t get enough sleep every night,you will not remember things well. 如果你每晚睡眠不足，你就不会很好地记住事情。 =Unless you get enough sleep every night,you will not remember things well. 除非你每晚睡眠充足，否则你不会把事情记得很清楚。 unless的读音、含义及用法 Let’s learn: Let’s learn: unless从句可以放在主句之前，也可以放在主句之后。 Unless you leave now,you will be late for school. =You will be late for school unless you leave now. 除非你早点出发，否则你上学会迟到。 Things to remember We can also put the if-clause and the unless-clause after the main clause. You will be late for school if you do not leave now. unless you leave now. unless和if …not的转换 1、从句的谓语动词为be 动词 Unless it is sunny this weekend, we will stay at home. = If it isn’t sunny this weekend, we will stay at home. Let’s learn: unless和if …not的转换 2.从句的谓语动词为实意动词 You will lose marks unless you improve your hand-writing. =You will lose marks if you don’t improve your hand-writing. She will lose marks unless she improves her hand-writing. =She will lose marks if she doesn’t improve her hand-writing. Let’s learn: Practice 2 Su Wen is thinking about his weekend plans. Rewrite the sentences using unless. (1) If it doesn't rain, I'll go for a picnic with my friends on Saturday. (2) I'm going to make a birthday card for my mother if I don't have any better ideas. (3) I'll finish reading Romance of the Three Kingdoms if I'm not too tired on Saturday evening. (4) I'll help Su Mei practise English if my mother's birthday party doesn't end too late. (1) Unless it rains, I'll go for a picnic with my friends on Saturday. 2 Su Wen is thinking about his weekend plans. Rewrite the sentences using unless. Practice （2） I'm going to make a birthday card for my mother unless I have some better ideas. 2 Su Wen is thinking about his weekend plans. Rewrite the sentences using unless. Practice （3） I'll finish reading Romance of the Three Kingdoms unless I'm too tired on Saturday evening. 2 Su Wen is thinking about his weekend plans. Rewrite the sentences using unless. Practice （4） I'll help Su Mei practise English unless my mother's birthday party ends too late. 　 2 Su Wen is thinking about his weekend plans. Rewrite the sentences using unless. Practice Exercise： 一.选择题 （ ）1.“If you ______ the correct answer , you ______ a big prize!” said the host. A. give; get B. will give; get C. give; will get D. will give; will get （ ）2. You won't get good grades in the exam ______ you study hard. A. if B. because C. unless D. when （ ）3.______ you go to the library tomorrow, please return this book for me. A. If B. Until C. Since D. Though （ ）4.You ______ the first bus ______ you get up right now. A. don't miss; if B. won't miss; unless C. will miss; if D. will miss; unless （ ）5.If you ____ to improve your health, you should exercise regularly. A. want B. wanted C. will want D. wanting C C A D A （ ）6. The ice ______ into water if you ______ it. A. will turn; heat B. will turn; will heat C. turns; heat D. turns; will heat （ ）7. Our business won’t improve ______ we offer better service to our customers. A. because B. unless C. after D. since （ ）8. In hot weather, food goes bad easily ______ it is kept in the fridge. A. Because B. if C. Unless D. since （ ）9. They ______ the Great Wall unless it ______. A. will visit; will rain B. will visit; rains C. visit; will rain D. visit; rains （ ）10. You ______ a toothache unless you ______ your teeth every day. A. will get; brush B. will get; will brush C. get; will brush D. get; brush Exercise C B C B A Exercise 二.用括号中所给单词的适当形式填空 1. If you ______ (come) tomorrow, we will go to the park together. 2. If you put sugar into the water, it _________ (disappear). 3. Unless you do more exercise, you _________ (lose) weight. 4. The tree _________ (grow) if you water it. 5. Unless you ______ (work) hard, you cannot pass the exam. come disappears will not lose will gow work 1.你要不快点就会错过公交车。 You the bus you hurry up． 2.如果你考试不及格，你会让他失望的。 If you fail in the exam, you him down. 3. 如果你在图书馆，应该保持安静。 You if you in the library. 4.除非你打开窗户，不然房间里会很热。 you open the window, this room very hot. 5. 凯特想知道她是否能为科学日做些事。 Kate wondered ______ ______ ______ ______ something for the Science Day. if she could do will miss unless will let should keep quiet are Unless will get Exercise 三.完成句子 The grammar we have learned Summary if引导的条件状语从句与 if…not 和unless if引导的条件状语从句 if…not and unless 时态原则： 主将从现”, “主情从现”、 “主祈从现 两者区别 if引导的是一种肯定的条件假设 unless引导的是否定意义的条件假设 时态原则： “主将从现”、“主情从现”、 “主祈从现”、“主从同现“ if 还可引导宾语从句，意为“是否”。　 I don't know if he can get here at six. 我不知道他是否能在六点到这里。 Self-assessment I can master the structure and usage of conditional sentences to talk about certain results (both verbs in simple present). I can use conditional sentences and unless to rewrite sentences and express logical relationships accurately. I can understand the relationship and usage between if…not and unless. Homework 1. 用 “表示必然结果的条件句” 结构造 3 个句子，描述生活中必然发生的现象。 2. 用 “unless” 造 3 个句子，表达生活中的条件关系（如Unless you study hard, you won't pass the exam.）。 3.Finish the exercises in English Yuangguang. THANK YOU 广州市增城区华大彦宏学校 $