单元语法聚焦三2省公开课一等奖新名师优质课比赛一等奖课件.pptx

单元语法聚焦祈使句Unit 3 Safety第1页教材典句1.Look at this yellow star,Brian and Jenny!布莱恩、詹妮，看这颗黄色星星！2.Let me get the ladder for you.让我给你拿把梯子。3.Dont stand on chairs.不要站在椅子上。单元语法聚焦第2页4.Be careful with scissors and knives!小心剪刀和刀子！5.Never smoke because of much pressure!永远不要因为压力大而吸烟！单元语法聚焦第3页语法探究 1.定义 祈使句是英语中基本句型之一，用来表示提议、命令、请求、警告、劝说、禁止等语气。祈使句主语普通为第 _人称，通常能够_。为了使语气愈加客气或缓解，可在句前或句末加上_一词。二单元语法聚焦省略please第4页2.组成 (1)祈使句必定形式普通以_动词或_动词原形开始，也能够以动词let 开始。(2)祈使句否定形式普通在句首加_或_。(3)以let开头祈使句：必定句：Let him come in.否定句：Dont let him come in.或Let him not come in.单元语法聚焦实义bedontnever第5页(4)有些祈使句可用No开头，表示禁止。No smoking,please.请不要吸烟。No photos!禁止拍照！单元语法聚焦第6页3.拓展 (1)祈使句反意疑问句 祈使句反意疑问句，若陈说部分是否定句，则附加问句只能 用will you。若陈说部分是必定句，附加问句既可用will you，也可用wont you。lets开头祈使句用于提出提议，包含对方，其附加问句用shall we。let us开头祈使句表示征求对方许可，其附加问句用will you。单元语法聚焦第7页Dont do that again,will you?Go with me,will you/wont you?Lets go,shall we?Let us take an exam,will you?(2)祈使句用于两个主要句型“祈使句and表结果陈说句”用来叙述必定条件。“祈使句or表结果陈说句”用来叙述否定条件。单元语法聚焦第8页注意 这两个句型都能够改写为if引导条件状语从句。Work hard,and you will pass the exam.(If you work hard,you will pass the exam.)Work hard,or you will not pass the exam.(If you dont work hard,you will not pass the exam.)单元语法聚焦第9页实战演练.单项选择()1.白银 Boys and girls，_ learning and have fun.Akeep Bto keep Ckeeping DkeptA单元语法聚焦第10页()2._carefully,please!Look at the road sign.There is a school ahead.ADrive BTo drive CDriving DDrives单元语法聚焦A第11页()3._ patient with him,please.He is only three years old.ADont BBe CIs DDoes 单元语法聚焦B第12页()4.渝北 _throwing those stones,please.AStop BStops CStopping DStopped单元语法聚焦A第13页()5.安徽 Hold your dream，_ you might regret some day.Aand Bor Cbut Dso单元语法聚焦B第14页()6.滨州I want to be a teacher when I grow up.Work hard，_ your dream will come true.Aor Bbut Cthough Dand单元语法聚焦D第15页.按要求完成以下各题1.达州 This warning sign tells us not to pick flowers.(保持句意基本不变)This warning sign says“_ _ flowers”2.天水 Tell him the truth at once,or he will be angry.(改为主从 复合句)_ _ dont tell him the truth at once,he will be angry.pick/No picking单元语法聚焦DontIfyou第16页3.天水Let us go hiking,_ _？(完成反意疑问句)4.You should be relaxed.(改为祈使句)_ _，please.5.Dont park here.(改为同义句)_ _！will单元语法聚焦BerelaxedNoparkingyou第17页