Medical researchers are painfully aware that there are many problems ____(他们至今还没有答案) (Key :which/that they haven’t found answers to)
真题中出现过如if 条件状语从句，no matter引导的让步状语从句。
建议：关于定语从句，到目前为止所考察的均为关系代词which/ that等所引导的，所以考生需额外留意关系副词where/ when/how 所引导的定语从句。对于状语从句，继续复习如时间状语从句，方式状语从句，因果状语从句等其他类状语从句。除却定语从句，状语从句外，名词性从句也需加强，如宾语从句(特别注意wish/ would rather 引导的宾语从句中虚拟样式)，表语从句，同位语从句甚至主语从句。
1、the more ~ the more~
A good teacher is the one from whom the more we need academically, the more she can supply.
2、It is ~ that ~
It is not just books that cant be judged by their covers，and so it is with presents.
3、too ~ to ~
Our boss is too narrow-minded to endure different opinions.
4、not ~enough to do ~
She is not old enough to make sense of the real meaning of the proverb- Time and tide wait for no man.
5、not ~ but ~
A masterpiece is not something that can conform into an expectation but something that has to be an expression from the heart.
Ducks can swim by instinct rather than intelligence.
Not until the director persuaded him did he agree to play a role of the doctor.
例如：It is conceivable that knowledge plays an important role in our life.
2、It is+形容词+to do/ doing
例如：She had said what it was necessary to say. 她已经说了一切有必要说的话。
Work hard, and you will finally be able to reach your destination. 努力工作，你就能实现自己的目标。
例如：It is said that visitors spend only half as much money in a day in Leeds as in Lon-don.
例如：The reservoir is three times as big as it was ten years ago. 这个水库的面积是十年前三倍。
6、倍数词+ more +名词/形容词十than
例如：Smoking is so harmful to personal health that it kills seven times more people eachyear than automobile accidents.
7、(not、as/ so... as(和……(不、一样、
例如：The environmental problems are not as serious as they suggested in their report.
8、no more... than(与……一样不、
例如：She is no more fit to be a manager than a schoolgirl would be.
9、Nothing is more... than(没有比……更……的;……是最……的、
例如：Nothing is more important than to receive education. 没有比接受教育更重要的事。
例如：They hurriedly escaped into a cave that smelt of terror.
11、without/ not so much as(甚至没有、
例如：Disappointed with her husband，Mary left home without so much as looking back at him.
12、may/ might as well(…as、(与其……还不如……、
例如：One may as well not know a thing at all as know but imperfectly.
13、too. . . to(太……而不能……;极其地、
例如：It was not too bright of them to settle in an area where earthquakes frequently occur.
14、only to find/ see(结果却;没想到会、
例如：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.