…… no …… without + N
结构︰…never／not／no…＋without＋名词／动名词
说明︰此句型意为“每…必然…；没有…就没有…”。这是双重<否定句>.有时译成“没有…而不…”：“每一次…都…”。
I cannot see this picture without thinking of my father.看到这幅画使我不能不想起我父亲。
I never see him without feeling like crying. 我每次见到他就想哭。
He never helps me without trying to take advantage of me. 他每次帮我都想占我便宜。
He never visits me without asking about our old friends.
他每次来访必然问起我们昔日的朋友。
The president of their company never makes a promise without intending to keep it.
他们公司的董事长每次许诺必然会遵守诺言。
He never went to the bookstore without buying some books.
他没有一次到书店而不买一些书。
They never met without smiling at each other. 他们每一次相遇都彼此微笑。
I never speak English without making mistakes. 我没有一次说英语而不犯错的。
Nothing great was ever achieved without enthusiasm.
没有一件伟大的事情可以达成而没有热诚。
No gains without pains. 不劳则无获。
No one can succeed without working hard. 没有人能够成功而不努力。
No one can live without breathing. 没有一个人可以不呼吸而生存。
No prisoner escaped from the prison without being seen.
没有一个囚犯逃离这个监狱而不被看到。
never …… but ……
结构︰never…＋but＋主词＋动词
说明︰此句型意为“每…必然…”。but 在此是<连接词>，引导<副词子句>.本句构的 but 相当于 if…not…。
It never rains but it pours. 一下雨就倾盆而降——祸不单行。
I never look at the stars but I think how little I am.我每次看星星必然会想自己是多么渺小。
She never reads a book but she goes to sleep. 她一看书就想睡觉。
He never goes on a vacation but he takes his pet dog. 他每次度假都会带他的狗去。
I never see him but I am happy. 我看到他就高兴。
He never goes out but he drops in at that bookstore.
他每次外出都会顺道去那家书店待一会儿。
I never fail to + V ……
结构︰主词＋never fail to＋原形动词
说明︰此句型意为“必定会…；一定会…”。fail 因包含“失败”的否定意义，故也属双重否定。
She never fails to write to her parents every month. 她每个月一定写信给她的父母亲。
He never failed to send the ambassador a report each week. 他每个礼拜必送报告给大使。
A good teacher never fails to try his best to answer his students.
一个好老师总是尽力为学生解答。
He is eloquent and humorous as well. What he says never fails to please us.
他口才好又幽默，他所说的一定能使我们高兴。
I cannot but + V ……
结构︰主词＋cannot＋but／choose but／help but＋原形动词
说明︰此句型意为“不得不…”。but 后只能跟原形<动词>.
I cannot but admire his wise plan. 我不得不赞美他的计划。
They cannot （choose） but admit that our requirement is reasonable.
他们不得不承认我们的要求是合理的。
I could not （help） but laugh. 我不禁笑出来。
It is not uncommon for ……
