知识点1:had better表示"最好"
[1]better单词记忆法◆记忆方法一:联想方式:be—是tt—兔兔er—耳记忆方式:兔兔的耳朵是更好的◆记忆方法二:联想方式:be—是tt—兔兔er—耳记忆方法:记忆方式:兔兔的耳朵是更好的
had better 相当于一个助动词,它只有一种形式,它后面要跟动词原形。
had better do sth
had better not do sth
It is pretty cold. You'd better put on my coat.
She'd better not play with the dog.
[2]with单词记忆法◆记忆方法一:联想方式:wi为;th他好为他好,才会和他在一起◆记忆方法二:联想方式:wi为;th他好记忆方法:为他好,才会和他在一起
had better have done sth表示与事实相反的结果,意为“本来最好”。
[3]done,have,相关知识点知识点1:could have done用法详解[1]could单词记忆法◆记忆方法一:联想方式:could-丑陋的这件事情的真相可能是丑陋的。◆记忆方法二:联想方式:could-丑陋的记忆方法:这件事情的真相可能是丑陋的。查看详情>>即表示过去本来可能发生情况,而实际上没有发生,通常译为“本来可以”“本来可能”等。如:She could have been seriously
You had better have come earlier.
知识点2:had better的用法

■可接进行式、被动式或完成式。如:
I’d better be going now. 现在我得走了。(心情近切)
She’d better be met by him. 最好他去接她。
You’d better have done that. 你要是把那件事办了就好了。
[4]have,done,相关知识点have/get sth. done句型结构分析语法讲解:句子成分、什么句型句法,怎么用什么意思[1]have单词记忆法◆记忆方法一:联想方式:ha(哈);ve(唯一)哈,唯一的一个苹果我吃了。◆记忆方法二:联想方式:ha(哈);ve(唯一)记忆方法:哈,唯一的一个苹果我吃了。◆记忆方法三:词根词缀记忆法:have v 有,hau=possess,表示“拥有”查看详情>>
■注意:1. 此结构中的 had 永远不可改为 have 或 has;2. 对上级或长辈不宜用此结构。
知识点3:had better用法详解

You’d better be getting your clothes ready. 你最好马上把衣服准备好。
You had betterhave done that. 你最好把那事做完。
You had better have stayed here. 你本来应该呆在这儿的。
[5]have单词记忆法◆记忆方法一:联想方式:ha(哈);ve(唯一)哈,唯一的一个苹果我吃了。◆记忆方法二:联想方式:ha(哈);ve(唯一)记忆方法:哈,唯一的一个苹果我吃了。◆记忆方法三:词根词缀记忆法:have v 有,hau=possess,表示“拥有”
4. had better的几点用法说明
(1) had better 用于提出建议或请求时,并不是一个很客气委婉的表达,它暗示对方有义务去做某事,因此通常用于长辈对晚辈或上级对下级等,而不宜反过来用。
(2) had best与had better用法和含义均差不多,但不如had better普通:
You had best get home before midnight.你最好在午夜之前回到家里。
We had best be going.我们最好现在就走。
(3) 有时可省略其中的had:
You better stop arguing.你们最好不要争论了。
Better not wait for him. 最好不要等他了。
Better say yes, if they ask you. 如果他们问你,你最好说“是”。
(4) 有时为了强调,可将better置于had之前:
"I promise I’ll pay you back." "You better had." “我保证还给你。”“你最好还给我。”
知识点4:had better的用法讲解

【注】在否定疑问句或反意疑问句中可将not与had连用。
如:Hadn't we better go now?我们是不是现在就去呢?
3.had better后接进行式和完成式动词
有时后接动词的进行式,表示最好马上做某事;也可接完成式动词,表示最好做完某事或本该做某事而未做某事。
如:I think I'd better be going.我想我最好还是马上走。
You'd better be getting your clothes ready.你最好马上把衣服准备好。
You had better have done that.你最好把那事做完。
[6]done,have,相关知识点“情态动词十have done”的用法[1]用法,动词,相关知识点动词appreciate的两点用法[1]appreciate单词记忆法◆记忆方法一:谐音:阿婆若是爱他 阿婆若是爱他,一定很赏识他。◆记忆方法二:分析:appre——苹果(apple)的近似拼写;ci——“吃”的近似拼写; ate——“吃” 的过去式; 记忆方法:我感激地接过这个苹果吃了又吃
You had better have stayed here.
你本来应该呆在这儿的。
4.有关had better的几点用法说明
(1)had better
用于提出建议或请求时,并不是一个很客气委婉的表达,它暗示对方有义务去做某事,因此通常用于长辈对晚辈或上级对下级等,而不宜反过来用。
(2)had best与had better用法和含义均差不多,但不如had better普通。
如:You had best get home before mid-night.你最好在午夜之前回到家里。
We had best be going.我们最好现在就走。
(3)有时可省略其中的had。如:
You better stop arguing.你们最好不要争论了。
Better not wait for him.最好不要等他了。
Better say yes, if they ask you.
如果他们问你,你最好说“是”。
(4)有时为了强调,可将better置于had之前。
“I promise I'll pay you back.”“You better had.”“我保证还给你。”“你最好还给我。”
had better单词相关例句:And also I hope smoker had better not smoke in public.
也希望吸烟的人们最好不要在公共场所吸烟。
And also I hope smoker had better not smoke in public.
也希望吸烟的人们最好不要在公共场所吸烟。
No one in Anjou had better hearing or could speak the local dialect more clearly than the wily wine grower.
在安育地区,对当地的土话懂得那么透彻,讲得那么清楚的,谁都比不上这狡狯的葡萄园主。
We had better call in a specialist at this critical moment.
在这个关键时刻我们最好请一位专家来。
Benzalkonium Bromide Tincture had better disinfection effect, but had irritation to skin.
百多邦对皮肤刺激性小但消毒效果低于新洁尔灭酊。
Peter said. "You had better come have today。" →Peter said I had better go there that day。
You had better bus it, otherwise you will be late. 你最好坐公共汽车,否则会迟到的。
We couldn't get to the city before it was dark; we had better hotel it pub it. 天黑以前我们进不了城,我们最好住宿。
We are very tired,(so)that we had better hurry home.
You had better eat vegetables fresh(= when they are fresh,不可用being fresh)