not...but...是很有用連接并列結(jié)構(gòu)的短語,意思為“不是...而是...".加從句也和加其他對象一樣,將其放在not...but...的省略號所在位置即可.如：It is not who you are or what background you have but what you can ...如果加的是陳述句呢？要加引導(dǎo)詞that嗎？所給的例句就是陳述句。再如：They want not your pity but your help.He helped not me but you.Ask not what your country can do for you;ask what you can do for your country.You should pay attention not to what they say but to what they do.but 還可以被直接看作是連接詞：No man is too old but he may learn.【but=but that引出的從句有結(jié)果含義】【其中的that經(jīng)常省略】Itnever rains but it pours.【but=but that】There is no rule but has exception.【關(guān)系代詞】Not a man but has tears in his eyes.【關(guān)系代詞】that 可以省略嗎？在什么情況下不能省略呢？問得好！省略，概括來講，都有統(tǒng)一的條件，即【適用文體的限制：口語和非正式文體才經(jīng)常用省略形式；二正式文體和正式交際場合都不用省略，以示莊重】