1. Fish cannot breathe out of water.
   魚(yú)離開(kāi)水就不能呼吸。
2. We cannot emphasize too much the importance of learning English.
   我們?cè)僭鯓訌?qiáng)調(diào)學(xué)英文的重要性也不為過(guò)。
3. People who cannot distinguish between colors are said to be color-blind.
   無(wú)法識(shí)別顏色的人是色盲。
4. One cannot commit crimes with impunity.
   一個(gè)人不能犯了罪不受懲罰。
5. The richest man in the world cannot buy everything.
   即使是世上最富有的人，也無(wú)法買(mǎi)到一切。
6. Man cannot exist without air.
   沒(méi)有空氣人就不能生存。
7. I was not privy to the discussion, so I cannot tell you what was decided.
   我并不了解討論的情況，所以無(wú)法告訴你做了什么決定。
8. She cannot buy daily necessities, much less luxuries.
   她連生活必需品都不能買(mǎi)，更不用說(shuō)奢侈品。

can.not

v.aux.（助動(dòng)詞）
The negative form of can
can的否定形式

The idiomatic phrasecannot but has sometimes been criticized as a double negative, perhaps because it has been confused withcan but. Thebut of cannot but, however, means .except,. as it does in phrases such asno one but, while thebut of can but has the sense only, as it does in the sentenceWe had but a single bullet left. Bothcannot but and can but are established as standard expressions. · The constructioncannot help is used with a present participle to roughly the same effect as cannot but in a sentence such as We cannot help admiring his courage. But this construction is generally restricted to contextsin which a person is unable to affect an outcome that would normally be under his or her control.It would be more precise to sayWith all the public interest in the affair, the book cannot but attract the attention of reviewers (or . . . can but gain . . . )than to say the book cannot help attracting the attention of reviewers, which suggests that the book might have had a say in the matter. · The constructioncannot help but probably arose as a blend of cannot help and cannot but; it has the meaning of the first and the syntax of the second:
習(xí)語(yǔ)cannot but 有時(shí)候被判定為一種雙重否定， 這也許是因?yàn)樗鸦煜?strong>can but 。 然而cannot but 中的 but 表示.除了.， 就如用在象no one but 這樣的短語(yǔ)中一樣， 而can but 中的 but 意思卻是 only（只有） ， 就如用在我們只剩下了一顆子彈 中那樣。 cannot but 和 can but 都已被確定為標(biāo)準(zhǔn)的表達(dá)法。 cannot help 結(jié)構(gòu)與現(xiàn)在分詞同用的作用和 我們禁不住欽佩他的勇氣 一句中的 cannot but 大致相同。 但這一結(jié)構(gòu)通常只限于這種情況，即一個(gè)人在該情況下不能實(shí)現(xiàn)正常情況下處于他或她控制之下的結(jié)果。由于公眾對(duì)該事件的濃厚興趣，這本書(shū)理所當(dāng)然地引起了評(píng)論家的注意 （或 …can but gain… ）的說(shuō)法比暗示這本書(shū)在此事中想必有決定權(quán)的 這本書(shū)情不自禁地吸引了評(píng)論家的注意 說(shuō)法要更為精確。 cannot help but 也許是來(lái)自 cannot help 和 cannet but 的混合； 它具有前者的意思和后者的句法結(jié)構(gòu)：
例句：
We cannot help but admire his courage.
我們情不自禁地欽佩他的勇氣。

The construction has sometimes been criticized as a redundancy,but it is by now an established idiom with reputable precedent on its side. ·The expressioncannot (or can`t ) seem to has occasionally been criticized as illogical, and so it is.
這一結(jié)構(gòu)有時(shí)被指責(zé)是一個(gè)贅語(yǔ)，但現(xiàn)在它已是一個(gè)有規(guī)范實(shí)例的習(xí)慣用法。另一個(gè)表達(dá)法cannot （或 can`t ） 好象 有時(shí)被批評(píng)為不符合邏輯， 而它確實(shí)也是不合邏輯。
例句：
Brian can`t seem to get angry does not mean .Brian is incapable of appearing to get angry,. as its syntax would seem to dictate;
Brian can`t seem to get angry并不表示如其句法所顯示的.布賴恩不能夠顯出生氣的樣子.；

rather, it means .Brian appears to be unable to get angry..But the idiom serves a useful purpose,since the syntax of English does not allow a logical equivalentlikeBrian seems to cannot . . . ; and thecannot seem to construction is so widely used that it would be pedantic to object to it. See Usage Note at but ,care ,help
而是表示.布賴恩看上去無(wú)法動(dòng)怒.。但這個(gè)習(xí)語(yǔ)是有意義的，因?yàn)橛⒄Z(yǔ)的句法不能容許其邏輯上的對(duì)應(yīng)物，如Brian seems to cannot… ； 而且cannot seem to 這一結(jié)構(gòu)是如此廣泛地被使用以至于若反對(duì)它就太學(xué)究氣了 參見(jiàn) but,care,help