Unit7 Memory 课时3 语法-【宝典训练】2023-2024学年八年级上册英语高效课堂课件(沪教牛津版)

Unit 7　Memory 课时3 语法 目 录 01 课时精讲 02 课时过关 01 课时精讲 语法精讲 由if引导的条件状语从句 主将从现句型。 【解析1】 (1)If it doesn't rain tomorrow, I'll go for a picnic with you． 如果明天不下雨，我就和你去野餐。 (2)He will stay if you need his help． 如果你需要他的帮助，他会留下来。 【讲解1】从以上两个句子可以看出表示条件的从句用一般现在时，用if引导；表示结果的主句用一般将来时，这种句型简称为主将从现句型。 第 ‹#› 页 课时3 语法 返回目录 连线搭配完整句子。 1．If you go to bed earlier， a．I'll tell you. 2．If you telephone your classmates, b．you'll remember to get all the things. 3．If you write a shopping list, c．they'll tell you what homework to do. 4．If I see him, d．you'll find out its meaning. 5．If you look it up in the dictionary, e．you'll not feel tired in the morning. 第 ‹#› 页 课时3 语法 返回目录 【小结1】 当谈论将来可能出现的情况时，主句用一般将来时，从句用 __________时，也就是：“主 ____ 从 ____”。 一般现在 将 现 第 ‹#› 页 课时3 语法 返回目录 主现从现句型。 【解析2】 (1)If the temperature falls to below zero, water turns into ice． 如果气温降到零度以下，水就会结成冰。 (2)The weather gets cool if there is a heavy rain in summer． 如果在夏天下一场大雨，天气就会变凉快。 【讲解2】从以上两个句子可以看出，表示条件的从句用一般现在时，用if引导；表示结果的主句用一般现在时，这种句型简称为主现从现句型。 第 ‹#› 页 课时3 语法 返回目录 连线搭配完整句子。 1．If you take a fish out of water， a．it melts. 2．If you cool water, b．it dies. 3．If you boil water, c．they grow. 4．If you heat metal, d．it turns into ice. 5．If you put wood into water, e．it floats. 6．If you plant seeds in soil, f．it breaks. 7．If you drop a glass, g．it becomes steam． 第 ‹#› 页 课时3 语法 返回目录 【小结2】 当谈论客观真理和普遍现象时，主句和从句都用 __________时。 在这种情况下，if 可以用 ______ 来替代。 When/If I am hungry, I usually have a full meal.当我饿了，我通常会吃得饱饱的。 一般现在 when 第 ‹#› 页 课时3 语法 返回目录 【总结】 (1)if从句可以放在句首，也可以放在句末。如果把if从句放在句首，常用逗号将其与主句隔开。 If it is fine tomorrow, we will go out. ＝ We will go out if it is fine tomorrow．如果明天天气好，我们将去郊游。 (2)if引导的条件状语从句中通常不用一般将来时。在需要表达将来含义时，一般用现在时表示。 (3)如果条件和结果之间存在必然联系时，所表示的是客观事实、必定会发生的结果时，如自然现象、客观真理等，通常用主现从现句型表示；如果条件和结果之间没有必然联系，所表示的只是个人想法和行为、可能会发生的结果时，通常用主将从现句型表示。 第 ‹#› 页 课时3 语法 返回目录 由if…not/unless引导的条件状语从句 【解析3】 (1)If you do not work hard, you will not succeed. 如果你不努力工作，你就不会成功。 (2)Unless you work hard, you will not succeed. 除非你努力工作，否则你不会成功。 【讲解3】从以上两个句子可以看出unless意为“除非”，和if…not(如果……不……)的意思相近，可以进行互换；在unless引导的从句中，通常用一般现在时，主句用一般将来时，也遵循主将从现的规律。 第 ‹#› 页 课时3 语法 返回目录 1．Don't come in ________________．不要进来，除非我叫你。 2．My father won't take me there _______________________． 我父亲是不会带我去那里的，除非我取得好成绩。 unless I call you unless I get good grades 第 ‹#› 页 课时3 语法 返回目录 3．Unless you keep ice-cream in a fridge, it will melt．(改为同义句) ___ you ______ keep ice-cream in a fridge, it will melt. 4．You will lose marks in the exam unless you improve your handwriting.(改为同义句) You ______ ______ marks in the exam _____ you ________ improve your handwriting． If don't will lose if don't 第 ‹#› 页 课时3 语法 返回目录 【小结3】 unless引导条件状语从句，意思是： ______，可以用 _________转换。 【总结】 if…not和unless引导的从句和主句的位置可以互换。但是当从句在前，主句在后时，一般用逗号隔开；反之，则不用逗号。 She won't lose weight if she doesn't keep a diet．＝ If she doesn't keep a diet, she won't lose weight． 如果她不控制饮食，她不会减轻体重的。 Unless she keeps a diet, she won't lose weight．＝ She won't lose weight unless she keeps a diet． 除非她控制饮食，否则她不会减轻体重。 除非 if…not 第 ‹#› 页 课时3 语法 返回目录 02 课时过关 请用if或unless填空。 1．You won't learn English well ________ you work hard. 2．___ you don't go to bed earlier, you will feel tired tomorrow. 3．I won't come to see you ______ I am asked to. 4．—Would you like to go shopping with us tomorrow? —Sure, ________ I am busy. 5．The art club is for members only.You can't go in ________ you are a member. 6．I'm waiting for my friend．_____ she doesn't come, I won't go shopping alone. unless If unless unless unless If 第 ‹#› 页 课时3 语法 返回目录 请用所给动词的适当形式填空。 1．—Do you know when he will come back tomorrow? —Sorry, I don't know.When he _______ (come) back, I'll tell you. 2．She will come to help us if she _____ (have) free time tomorrow. 3．If you listen carefully, you _______________ (understand) the report well. 4．—Mum, my tooth hurts so much. —If you stop eating too many sweets, you ________ (get) better. 5．Do you know if he _______ (want) to apply for the exchange program? comes has will understand will get wants 第 ‹#› 页 课时3 语法 返回目录 按要求完成下列句子。 1．Dr.Wang will give us a talk if it is fine tomorrow.(同义句转换) Dr.Wang ______ _____ give us a talk ________ it is fine tomorrow. 2．People will get tired if they work for a long time.(同义句转换) People ______ _____ get tired ________ they work for a long time. 3．Linda will have free time．She'll take memory lessons.(合并句子) Linda will take memory lessons ____ she _____ free time. will not unless will not unless if has 第 ‹#› 页 课时3 语法 返回目录 4．Sam will miss the first bus unless he gets up early.(同义句转换) Sam will miss the first bus ____ he __________ get up early. 5．Hurry up! Or the others will catch up with us.(同义句转换) The others will catch up with us ____ we ________ hurry up. 6．You will feel worse unless you take more exercise.(用if改写句子) You ________ feel worse ____ you take more exercise. 7．Unless you are careful, the car may hit you.(用if改写句子) _____ you are careful, the car _____ _____ hit you． if doesn't if don't won't if If may not 第 ‹#› 页 课时3 语法 返回目录 8．No one is going to help you unless you change your mind.(用if改写句子) No one is going to help you ____ you ________ ________ your mind． 9．_____ my grandma wears glasses, she can see better.(用if或unless填空) 10．I won't buy that backpack ________ I really need it.(用if或unless填空) if don't change If unless 第 ‹#› 页 课时3 语法 返回目录 语法填空。 阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式，并将答案填在相应的答题位置上。 Mr Grey was the manager of a small office in London.He lived in the country，and went to work 1．____ train．He liked 2．_________ (walk) from the station to his office unless it was raining because it 3．______ (give) him some exercise． by walking gave 第 ‹#› 页 课时3 语法 返回目录 One morning he was walking along the street 4．______ a stranger stopped him and said to him, “You may not remember 5．____ (I)，sir．Seven years ago I came to London without a penny in my pockets.I 6．_________ (stop) you in this street and asked you 7．_______ (lend) me some money．You lent me ￡5，and you said you were willing to take a chance so as to give a man a start on the way to 8．________ (succeed)．” Mr Grey 9．_________ (think) for a few minutes and then said, “Yes，I remember you.Go on with your story！” “Well，” said 10．______ stranger, “are you still willing to take a chance？” when me stopped to lend success thought the 第 ‹#› 页 课时3 语法 返回目录 本节内容到此结束！ logo $$ Unit 7 Memory 课时3 语法 【课时精讲】 【解析1】1．e 2．C 3．b 4．a 5．d 【小结1】一般现在；将；现 【解析2】1．b 2．d 3．g 4．a 5．e 6．c 7．f 第 ‹#› 页 课时3 语法 返回首页 【小结2】一般现在; when 【解析3】1．unless I call you 2．unless I get good grades 3．If; don’t 4．will lose; if; don’t 【小结3】除非; if…not 第 ‹#› 页 课时3 语法 返回首页 【课时过关】 一、1．unless 2．If 3．unless 4．unless 5．unless 6．If 二、1．comes 2．has 3．will understand 4．will get 5．wants 第 ‹#› 页 课时3 语法 返回首页 三、1．will not; unless 2．will not; unless 3．if; has 4．if; doesn’t 5．if; don’t 6．won’t; if 7．If; may not 8．if; don’t change 9．If 10．unless 第 ‹#› 页 课时3 语法 返回首页 四、1—5 BACCC 6—10 ACBAB 五、1．herself 2．but 3．hungry 4．for 5．dinner 6．potatoes 7．thanked 8．later 9．a 10．If 第 ‹#› 页 课时3 语法 返回首页 本节内容到此结束！ logo $$