资源简介

(共23张PPT)
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 had better
全解精讲+分层练习
学习目标
理解should与had better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had better。
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：We should help people in need.
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：You should read English every day.
例句：Students should keep the classroom clean.
should 否定句结构
should的否定形式为should not，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：You shouldn’t talk loudly in the library.
例句：He shouldn’t spend too much time on games.
had better 核心含义与用法
had better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’s going to rain. You had better take an umbrella.
had better 肯定句结构
完整形式：had better，常用缩写：’d better。
肯定句结构：主语 + ’d better + 动词原形。
所有人称统一使用had better，无变化。
不是过去式，只表示现在或将来的建议。
例句：You’d better get up early tomorrow.
had better 否定句结构
had better否定形式：had better not，缩写：’d better not。
否定句结构：主语 + ’d better not + 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’d better not swim in the deep river.
核心用法对比表
项目 should had better
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：You should practice English more.
had better例句：It’s late. You’d better go home now.
should例句：We should protect the environment.
had better例句：It’s cold. You’d better wear warm clothes.
常见错误提醒
should和had better后面绝对不能加to。
错误：You should to study hard. 正确：You should study hard.
错误：You had better to rest. 正确：You had better rest.
had better没有人称变化，不能写had betters。
否定词not位置固定，不可随意改动。
拓展知识：ought to
ought to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 + ought to + 动词原形。
否定形式：ought not to + 动词原形。
选词填空练习一
用should/shouldn’t填空
You _________ listen carefully in class.
We _________ waste food in daily life.
She _________ keep practicing spoken English.
They _________ run in the school hallway.
should
shouldn’t
should
shouldn’t
选词填空练习二
用had better/had better not填空
It’s cold outside. You ______________ wear warm clothes.
The river is deep. You _______________ swim here.
The bus is coming. You _______________ hurry up.
It’s raining. You _______________ go out without an umbrella.
had better
had better not
had better
had better not
动词形式填空练习一
You should ___________ (drink) enough water every day.
He shouldn’t ___________ (eat) too much sweet food.
We’d better ___________ (get) to the classroom early.
You’d better not ___________ (touch) the broken glass.
he should ___________ (finish) homework before relaxing.
They’d better ___________ (not play) on the busy road.
I should ___________ (read) English every morning.
You had better ___________ (ask) the teacher w
drink
eat
get
touch
finish
not play
read
ask
单项选择练习一
1. You ______ keep quiet in the library.
A. should B. should to C. should not
2. It’s going to rain. You ______ take a raincoat.
A. had better B. had better to C. had not better
3. You ______ swim in this deep river. It’s dangerous.
A. should B. had better not C. had better
4. He ______ be late for the important meeting.
A. shouldn’t B. should C. had better
A
A
B
A
句型转换练习
1. You should get up early. 改为否定句
You _________ get up early.
2. You’d better stay at home. 改为否定句
You _________ _________ _________ stay at home.
3. We should help each other. 写出同义句
We _________ _________ help each other.
4.You’d better not talk in class. 写出同义句
You _________ talk in class.
shouldn’t
had better not
ought to
shouldn’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had better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：
You should go to bed early.
You should listen to the teacher carefully.
You’d better stay at home.
You’d better hurry up.
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。
You should exercise every day.
You’d better go home and rest now.
We shouldn’t throw rubbish everywhere.
You’d better not go out alone at night.
He should take this exam seriously.
We’d better finish tasks early.
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。
had better表示“最好”，用于强烈提醒与警示。
结构：’d better/’d better not + 动词原形。
两者均无人称变化，一律接动词原形。
重点总结二
普通建议、习惯养成 → 用should。
安全提醒、时间紧急、风险提示 → 用had better。
否定形式直接加not，位置固定不变。
做题时重点检查动词是否使用原形。
多结合例句造句，能更快熟练运用。
教学课件
Unit6语法专项—— 情态动词 should 与 had better
Thank you for listening!

展开更多......

收起↑