不定代词both和all的用法
1．both和all和be动词、助动词、情态动词连用时,在它们之后.和实义动词连用时在实义动词之前.如：
They are both students.
他们都是学生.
They both ran away.
他们两人都跑走了.
They are both working hard.
他们两人都努力工作.
You can all go home.
你们都可以回家了.
2．both和all跟“of 短语”连用时,后接名词时both和all可以省略of；后接代词时,both和all不能省略.例如：
Both of them are workers.
他们两人都是工人.
All(of) the students are ready for class.
所有的学生都做好了上课准备.
all的句法功能
all “都,三者或三者以上都”.具有名词和形容词的性质,在句中都可作主语、宾语、表语、定语和同位语.既能修饰可数名词又能修饰不可数名词.代替不可数名词作主语时,谓语动词用单数形式,代替复数可数名词时,谓语动词用复数.
1．作主语
All enjoyed themselves.（可数）
所有的人都玩的很开心.
Now all was changed.（不可数）
现在一切都改变了.
2．作宾语
It is hard to please all.
想要取悦所有的人是难以做到的.
3．作表语
Is that all you want to say?
你要说的就是这么一些?
4．作定语
Granddad hunted all winter long but could not clear debt.
爷爷整个冬天都在打猎可还是无法还清债务.
5．作同位语
We all have troubles.（可数）
我们大家都有难处.
However I can discuss this all when I see you.（不可数）
无论如何,我们见面的时候这一切都是可以讨论的.
both的用法
both“两者都”.具有名词和形容词的性质,在句中只可作主语、宾语、定语和同位语E.只能修饰复数的可数名词.作主语时谓语动词用复数形式.
1．作主语
Both felt that they had become very friendly.
他们两人都感觉到变得非常亲密了.
2．作宾语
Why not use both?
两个都用吧.
3．作定语
Both men were interested in the job.
两个人都对这项工作感兴趣.
4．作同位语
They both refused to surrender.
他们两人都拒绝投降.
would like和 want
would like to do sth是愿意作某事表示愿意乐意可以等于Be will to do sth
而want to do sth 式表示想要做某事表达一种想法,前者程度更深
A 在下列情况下,这两个词可以互换使用：
1 用于请求或有关请求的问句中（但这里不使用 would not like,参见下面B1）：
Customer：I’d like some raspberries,please．/I want some raspberries,please．
顾客：请给我拿点儿木莓.
Greengrocer：I’m afraid I haven’t any．Would you like somestrawberries?
蔬菜水果商：对不起,我没有木莓了.您来点草莓怎么样?
Customer：No,I don’t want any strawberries,thanks．
顾客：不,我不想要草莓.（这里不能用 wouldn’t like.）
I would like常常要比 I want更有礼貌.
would you like?要比do you want?更有礼貌,也更殷勤.
would you like?可以含有愿意满足别人的希望的意思.do youwant?则不含有这种意思.因此,与顾客或客人打交道时,通常用 would you like?：
Caller：I’d like to/I want to speak to Mr X,please．
打电话者：我想找X先生说话.
Telephonist：Mr X is out．Would you like to speak to Mr
话务员：X先生出去了.您跟Y先生说行吗?
2 如果不是提出请求而只是谈到愿望时,可以随意用would like或want的肯定式、疑问式或否定式.它们的意思没有区别,然而,I want要比I would like显得更自信.I want通常不用于表示不可实现的愿望：
I would like to live on Mars．
但愿我能住到火星上去.
B would like和want在下列用法中不能互换：
1 表示邀请时用 would you like?结构,而不能用do you want?结构：
Would you like a cup of coffee?
您想喝一杯咖啡吗?
Would you like to come to the theatre?
您想来剧院看戏吗?
do you want?用于此处只表示一种询问,不含有邀请的意思.
2 wouldn’t like和 don’t want是有区别的.
don’t want表示没有某种愿望；wouldn’t like表示不喜欢.因此,wouldn’t like不能用来回答邀请或提议,因为在这种回答中 wouldn’t like的口气将是不礼貌的.在这里常用 don’twant或其他形式来代替 wouldn’t like：
—Would you like some more coffee?
—No,I don’t want any more,thanks．/No,thanks．
—您再来点儿咖啡吗?
—不,不要了,
C 在过去时中这两种形式的变化不同.在间接引语中want变为 wanted,而would like不起变化：
Tom said,‘I would like/want to see it．’
汤姆说：“我想看看它”.相当于：
Tom said he would like/wanted to see it．
汤姆说他想看看它.
但如果不用间接引语的结构来表示,只能说：Tom wanted tosee it（这里我们不能用would like因为Tom would like to seeit的意思是指现在或将来）.
D would like有两个过去形式：would like+ 不定式的完成式或would like+ 不定式/名词/代词.这些形式只能表示未能实现的愿望：
I’d like to have gone skiing．/I’d have liked a day’s skiing．
我本想去滑雪的.（但我未能实现我的愿望.）