1.all修飾名詞主語時(shí),可放在主語和行為動(dòng)詞之前,但要放在be動(dòng)詞之后（但是若be動(dòng)詞是句子中的最后一個(gè)詞時(shí),all要放在be動(dòng)詞之前）.如：

All the boys study well.= The boys all study well.孩子們都學(xué)習(xí)得很好.

They are all steel workers.他們都是鋼鐵工人.

—Are you Young Pioneers?你們是少先隊(duì)員嗎?

—Yes,we all are.是的,我們都是少先隊(duì)員.

2.all指“三個(gè)（以上）的數(shù)目”,反義詞是none；both指“兩個(gè)數(shù)目”,反義詞是neither.如：

I have three brothers.All of them are college students.我有三個(gè)哥哥,他們都是大學(xué)生.

He has two sisters.Both of them major in English.他有兩個(gè)姐姐,她們都主修英語.

3.不能說“all + 代詞”,要說“代詞+ all”或“all of + 代詞”.如：

誤：All they like her.

正：They all like her./All of them like her.他們都喜歡她.

4.“All + 冠詞（指示代詞或物主代詞）”=“冠詞（指示代詞或物主代詞）+ whole”.如：

all the world = the whole world全世界

all my life = my whole life 我的一生

注：all可修飾不可數(shù)名詞或復(fù)數(shù)名詞,the whole不可直接修飾不可數(shù)名詞或復(fù)數(shù)名詞,應(yīng)用the whole of.如：

all Shanghai = the whole of Shanghai 全上海

all ink = the whole of ink 所有墨水

all his books = the whole of his books 他所有的書

5.all用于否定句時(shí)通常表示部分否定,要表示全部否定可用no,none等.如：

All my friends cannot swim.并非我所有的朋友都會(huì)游泳.

None of my friends can swim.我所有的朋友都不會(huì)游泳.

I don”t know any of them.他們我都不認(rèn)識(shí).

6.all不能與what連用,可把what改為that.例如：

誤：This is all what I want to say.

正：This is all that I want to say./ This is what I want to say.這就是我要說的全部.

7.“all +地名”,表示“全……的人”；“the whole of +地名”表示“全……的地方”.如：

All America celebrate Independence Day on July 4.7月4日全美國（人民）慶祝獨(dú)立紀(jì)念日.

He has traveled the whole of America.他已經(jīng)游遍了全美國.

8.“all +抽象名詞”=“very +形容詞”,前者語氣更強(qiáng).如：

Little Amy is all attention.= Little Amy is very attentive.小埃米非常專心.

He is all kindness to us all.= He is very kind to us all.他對(duì)我們大家非常親切.

9.at all作“完全；根本”解時(shí),多用于否定句；用于條件句時(shí)表示“既然；即使”；用于疑問句時(shí),作“到底；在任何程度上”解.如：

If it were not for the sun,we could not live at all.如果沒有太陽,我們根本不能生存.

Have you read any of the article at all?那篇文章你到底有沒有讀過一點(diǎn)