Unit6语法专项课件情态动词should与hadbetter-沪教版英语八年级下册-

教学课件沪教（牛津）英语八年级下册Unit6语法专项——

情态动词should与hadbetter

全解精讲+分层练习

学习目标理解should与hadbetter的含义与语气差别掌握肯定句、否定句的完整结构能结合真实例句正确使用在各类题型中准确运用避免常见语法错误情态动词基础特点情态动词用于表达建议、义务、态度与语气。本单元重点学习should和hadbetter。两者后面必须直接跟动词原形，不能加to。没有人称和数的变化，主语不改变形式。不能单独作谓语，必须搭配实义动词。should核心含义与用法should意为“应该、应当”，用于提出合理建议。语气委婉、客观，属于一般性正确指导。常用于学习习惯、行为规范、道德与责任场景。不强调不做会有严重后果，只说明正确做法。例句：Weshouldhelppeopleinneed.should肯定句结构肯定句结构：主语+should+动词原形。无论主语是第几人称，should形式不变。后面动词必须用原形，不可加s/ing/to。例句：YoushouldreadEnglisheveryday.例句：Studentsshouldkeeptheclassroomclean.should否定句结构should的否定形式为shouldnot，缩写为shouldn’t。否定句结构：主语+shouldn’t+动词原形。用于温和劝阻不合适、不礼貌、不正确的行为。例句：Youshouldn’ttalkloudlyinthelibrary.例句：Heshouldn’tspendtoomuchtimeongames.hadbetter核心含义与用法hadbetter意为“最好”，用于给出强烈建议。语气比should更直接、更口语化。暗含“不这样做会有不好结果”的提醒。适合天气、安全、时间紧迫等紧急场景。例句：It’sgoingtorain.Youhadbettertakeanumbrella.hadbetter肯定句结构完整形式：hadbetter，常用缩写：’dbetter。肯定句结构：主语+’dbetter+动词原形。所有人称统一使用hadbetter，无变化。不是过去式，只表示现在或将来的建议。例句：You’dbettergetupearlytomorrow.hadbetter否定句结构hadbetter否定形式：hadbetternot，缩写：’dbetternot。否定句结构：主语+’dbetternot+动词原形。not位置固定，不可放在had后或省略。用于强烈提醒不要做危险、错误的事。例句：You’dbetternotswiminthedeepriver.核心用法对比表项目shouldhadbetter意思应该最好语气委婉、普通强烈、提醒后果无强调暗含不良后果场景日常、学习、规则紧急、安全、赶时间高频例句对比should例句：YoushouldpracticeEnglishmore.hadbetter例句：It’slate.You’dbettergohomenow.should例句：Weshouldprotecttheenvironment.hadbetter例句：It’scold.You’dbetterwearwarmclothes.常见错误提醒should和hadbetter后面绝对不能加to。错误：Youshouldtostudyhard.正确：Youshouldstudyhard.错误：Youhadbettertorest.正确：Youhadbetterrest.hadbetter没有人称变化，不能写hadbetters。否定词not位置固定，不可随意改动。拓展知识：oughttooughtto与should含义接近，也表示“应该”。语气更正式，日常使用频率较低。结构：主语+oughtto+动词原形。否定形式：oughtnotto+动词原形。选词填空练习一用should/shouldn’t填空You_________listencarefullyinclass.We_________wastefoodindailylife.She_________keeppracticingspokenEnglish.They_________runintheschoolhallway.shouldshouldn’tshouldshouldn’t选词填空练习二用hadbetter/hadbetternot填空It’scoldoutside.You______________wearwarmclothes.Theriverisdeep.You_______________swimhere.Thebusiscoming.You_______________hurryup.It’sraining.You_______________gooutwithoutanumbrella.hadbetterhadbetternothadbetterhadbetternot动词形式填空练习一Youshould___________(drink)enoughwatereveryday.Heshouldn’t___________(eat)toomuchsweetfood.We’dbetter___________(get)totheclassroomearly.You’dbetternot___________(touch)thebrokenglass.heshould___________(finish)homeworkbeforerelaxing.They’dbetter___________(notplay)onthebusyroad.Ishould___________(read)Englisheverymorning.Youhadbetter___________(ask)theteacherwdrinkeatgettouchfinishnotplayreadask单项选择练习一1.You______keepquietinthelibrary.A.shouldB.shouldtoC.shouldnot2.It’sgoingtorain.You______takearaincoat.A.hadbetterB.hadbettertoC.hadnotbetter3.You______swiminthisdeepriver.It’sdangerous.A.shouldB.hadbetternotC.hadbetter4.He______belatefortheimportantmeeting.A.shouldn’tB.shouldC.hadbetterAABA句型转换练习

1.Youshouldgetupearly.改为否定句You_________

getupearly.2.You’dbetterstayathome.改为否定句You___________________________stayathome.3.Weshouldhelpeachother.写出同义句We__________________helpeachother.4.You’dbetternottalkinclass.写出同义句You_________talkinclass.shouldn’thadbetternotoughttoshouldn’t情景建议练习一用should给下列情景写建议朋友经常熬夜，第二天精神很差建议：同学上课不认真，学习效率低建议：情景建议练习二用hadbetter给下列情景写建议外面即将下大雨，不宜外出建议：马上要迟到，需要尽快出发建议：Youshouldgotobedearly.Youshouldlistentotheteachercarefully.You’dbetterstayathome.You’dbetterhurryup.翻译句子你应该每天坚持锻炼身体。你最好现在就回家休息。我们不应该随意乱扔垃圾。你最好不要独自在夜晚外出。他应该认真对待这次重要考试。我们最好早点完成课堂任务。Youshouldexerciseeveryday.You’dbettergohomeandrestnow.Weshouldn’tthrowrubbisheverywhere.You’dbetternotgooutaloneatnight.Heshouldtakethisexamseriously.We’dbetterfinishtasksearly.重点总结一should表示“应该”，用于委婉合理的日常建议。结构：should/shouldn’t+动词原形。hadbetter表示“最好”，用于强烈提醒与警示。结构：’dbet