英語(yǔ)的一致關(guān)系有三種:主謂一致，代詞一致，肯定與否定一致。

　　(一)主語(yǔ)與謂語(yǔ)的一致

　　英語(yǔ)語(yǔ)法要求，主語(yǔ)如果是單數(shù)，謂語(yǔ)動(dòng)詞也要用單數(shù)形式;主語(yǔ)若是復(fù)數(shù)，謂語(yǔ)動(dòng)詞也要用復(fù)數(shù)形式

　　例如:

　　She likes to eat well.她好吃

　　We all like good food.我們都喜歡好飯菜。

　　Everybody was happy with the decision. 人人都對(duì)這個(gè)決定感到高興。

　　I am a doctor.我是個(gè)醫(yī)生。

　　(二)概念一致

　　1. And連接的兩個(gè)或多個(gè)單數(shù)名詞作主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞用復(fù)數(shù)形式

　　His opinion and mine are different他的觀點(diǎn)和我的是不同的。

　　Bob and Peter are deadly rivals. Bob和peter是死對(duì)頭。

　　What she says and what she does are totally different. 她說(shuō)的和做的完全不同。

　　但是如果and連接的是指一個(gè)單一概念時(shí)，謂語(yǔ)動(dòng)詞用單數(shù)。

　　Bread and milk has been my breakfast for years. 牛奶面包多年來(lái)一直是我的早餐。

　　Her lawyer and old friend is going to marry her.她的律師和老朋友要娶她。

　　All this effort and sacrifice has come to nothing. 所有這些努力和犧牲都白費(fèi)了。

　　由and連接的單數(shù)主語(yǔ)分別有many a，ever y，each，no修飾時(shí)，動(dòng)詞用單數(shù)。

　　如：During the holidays, every train and every plane was crowded.假期期間每列火車及每架飛機(jī)都非常擁擠。

　　No boy and no girl has the right to refuse education. 男孩和女孩都沒有拒絕教育的權(quán)利。

　　Man a man and man a woman was moved b this picture。許多男男女女都被這幅畫感動(dòng)。

　　2.如果主語(yǔ)是一個(gè)抽象概念(如不定式、動(dòng)名詞、主語(yǔ)從句等)謂語(yǔ)動(dòng)詞用單數(shù)形式。如果主語(yǔ)是用and連接的兩個(gè)或多個(gè)抽象概念，謂語(yǔ)動(dòng)詞用復(fù)數(shù)形式。

　　如：Swimming jogging and cycling are all goad farms of sports exercises.游泳、慢跑和騎自行車都是很好的運(yùn)動(dòng)形式。

　　To live to eat is not a very goad attitude toward life. 活著就是為了吃不是好的生活態(tài)度。

　　To live to eat and to eat to live are very different attitudes toward life.

　　以what，who，why，haw, whether等wh一詞引起的從句做主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞通常用單數(shù);由and連接的兩個(gè)主句如果指兩件事，動(dòng)詞用復(fù)數(shù)。

　　例如:What he is doing is not clear yet他在干什么還不清楚

　　What he is doing and whether I know him are two different things.他在干什么和我是否認(rèn)識(shí)他是兩件不同的事。

　　What she told me is none of your business. 她和我說(shuō)的什么用不著你管。

　　What she told me and what she told you are totally different things.

　　以what從句為主語(yǔ)的“主一系一表SVC"句型中，如果主句的表語(yǔ)是復(fù)數(shù)，主句謂語(yǔ)動(dòng)詞用復(fù)數(shù)形式;what從句本身是復(fù)數(shù)意義，主句謂語(yǔ)動(dòng)詞也可用復(fù)數(shù)。

　　如：What I need buy now are four tea cups and a pair of sports shoes.

　　我需要買的是四只茶杯和一雙運(yùn)動(dòng)鞋。

　　What were thought to be five dogs were actually five sheep.

　　被認(rèn)為是五條狗的東西實(shí)際上是五只羊。

　　3.集體名詞family，class，crew(全體船員或機(jī)組人員)，crowd, group, committee, audience, government, public, team, staff, population等做主語(yǔ)時(shí)，若作為一個(gè)整體看待，后面謂語(yǔ)動(dòng)詞用單數(shù); 如就其中每一個(gè)成員來(lái)考慮時(shí)，則用復(fù)數(shù)。

　　例如: My family is a big one.我家人多。

　　My family are all music lovers. 我全家人都愛好音樂。

　　Eighty percent of China\' s population are peasants. 百分之八十的中國(guó)人口是農(nóng)民。