It is ＋形容词＋ that...It is conceivable that knowledge plays an important part in our life.可想而知，知识在我们的生活中扮演着一个重要的角色。 It is ＋形容词＋ to do / doingShe had said what it was necessary to say.她已经说了一切有必要说的话。 There is no doubt that...（毫无疑问，……）There is no doubt that war can be avoided if we get down to peace talk.毫无疑问，如果我们肯认真和谈就能避免战争。 It occurred to sb. that...（突然想到……）It had never occurred to Cinderella she would become a princess someday.辛德瑞拉从来没有想到有朝一日她会成为一位王妃。 It is taken for granted that...（……被认为是理所当然的）It has been taken for granted that women should take on all the housework.人们一直理所当然地认为，女性应当承担全部家务。 It is/was said that...（据说……）It is said that man is the least biologically determined species of all because he possesses feature absent in other natural species.据说人类是生物学上最难归类的物种，因为人类拥有其他天然物种所缺乏的特性。 (The) chances are that...（很可能……）Chances are that she has already known it, and there is no need for us to keep the secret.她很可能已经知道了，所以我们没有必要再保守这个秘密。 As far as sb. / sth. is concerned, ...（就……而言，在……看来）As far as I am concerned, fashion belongs to women.在我看来，时尚是属于女性的。 When it comes to...（提及；当提到……的时候）When it comes to photography, I’m not an adept.要说照相，我不是内行。 Be that as it may, ... （尽管如此，尽管那样，话虽如此）We might have a lot of competitors. Be that as it may, our products are still the best in the market.我们一直有很多竞争对手，即便如此，我们的产品仍然是市面上最好的。 As it were, ...（似乎，好像；可以说是）做插入语通常位于句中，也可用于句末Worse still, we leave the entire process to chance — to the Fates, as it were.更糟糕的是，我们把这过程归结于机遇，也可以说把它归结于命运。
祈使句/名词＋ and / orWork hard, and you will finally be able to reach your goal.努力工作，你就能实现自己的目标。 as ＋ many / much ＋名词＋ asIt is said that visitors spend only half as much money in a day in Leeds as in London.据说，游客每天在利兹的花销仅为在伦敦的一半。 倍数词＋ as ＋形容词＋ asThe pool is three times as big as it was ten years ago.这个水池的面积是十年前的三倍。 倍数词＋ more ＋名词／形容词＋ thanSmoking is so harmful to physical health that it kills seven times more people each year than auto accidents.吸烟对人体健康的危害极大，每年死于吸烟的人比死于车祸的人多七倍。 感官动词＋ of ＋名词They hurriedly escaped into a cave that smelt of terror.他们仓皇地逃入一个充满恐怖气氛的山洞。 （not）as / so...as... （和……不一样/一样）The environmental pollution is not as serious as they suggested in their report.环境污染没有他们在报告中说得那么严重。 no more...than... （与……一样不……）She is no more fit to be a manager than a school girl would be.一个女学生固然不宜当经理，她也同样不宜。 rather than（而不是……）Rather than pursue money to achieve happiness, we should focus on the improvement of ourselves.我们应该集中精力改善自我，而不是追求金钱的享乐。 Nothing is more...than...（没有比……更……的；……是最……的）Nothing is more important than to receive education.没有比接受教育更重要的事。 Better... than... （宁愿……也不……）Better my life should be ended by their hate, than that hated life should be prolonged to live without your love.我宁愿死在他们的仇恨之下，也不愿延长这可恨的生命而得不到你的爱。 without / not so much as...（甚至没有……）Disappointed with her husband, Monica left home without so much as looking back at him．出于对丈夫的失望，莫妮卡离开了家，甚至都没有回头看他一眼。 may / might as well（...as）（与其……还不如……）One may as well not know a thing at all ask now but imperfectly.与其一知半解还不如彻底蒙在鼓里。
too...to（太……而不能……；极其地）It was not too bright of them to settle in an area where earthquakes frequently occur.他们选择在地震多发的地区定居，这可不是个明智的决定。 only to find / see（结果却；没想到会）He spent almost all his money to buy the hen which was said to be able to lay gold eggs, only to find it could not lay eggs at all.为了买那只据说能下金蛋的母鸡，他几乎倾家荡产，没想到这只鸡根本不会下蛋。 have only to do ... to ... （只要……就能……）We have only to turn to that extraordinary discovery made by Edison to see the significance of it.我们只需要研究一下爱迪生的所做出的杰出发现，就能看到其重大意义。 not...until...（直到……才）We can’t release the film until we have the approval from the authority concerned.直到获得有关当局的批准我们才能发行那部电影。 not...unless（除非……否则……）No increase in output can be expected unless a new assembly line is installed.除非安装一条新的装配线，否则提高产量是没有指望的。 not...but...（不是……而是……）To our disappointment, the plan caused not development but destruction.让我们失望的是，这个计划带来的不是进步而是破坏。 so / such（...）that（如此……以至于）With the rumor spreading fast, their anxiety was such that they could not sleep / they became so anxious that they could not sleep.在谣言迅速散播的情况下，他们焦虑异常，无法入睡。 be not much of a...（是个不太好的……）Mike is not much of a teacher for he often skips from one subject to another.麦克不是个好老师，因为他总是从一个话题跳转到另一个话题。 not only...but also...（不但……而且……）In production, we demand not only quantity but also quality.我们的产品不但要求数量多，而且要求质量高。 (n) either...(n) or...（既不……也不……；或者……或者……）Most single parents are either divorced or separated.大多数单身父母要么离婚了, 要么分居了。 no sooner than / hardly when / scarcely when（刚……就……）I had hardly opened the door when he rushed in.我刚开门他就冲进来了。 the more...the more...（越……越……）The more she learns, the more she wants to learn.她越学越想学。