例：As（it is）in your country, we grow wheat in the north and rice in the south.
· as+描述词/副词原级+（a /an）+名词+as ;
否定式：not as/so — as
例：He is as good a player as his sister.
· such + n. + as to do 如此……致使于……
例：She is such a fool as to believe what he said.
· so + adj./adv. + as to do sth 如此……致使于……
例：He was so strong as to carry the heavy box.
· such…as… 象……之类的…… （接名词或定语从句）
例：He wished to be such a man as Lei Feng was.
· the same +名词+as 和……相同的…… （接名词或定语从句）
例：He is not the same man as he used to be.
· prefer to do sth
例：I prefer to stay at home.
· prefer doing sth
例：I prefer playing in defence.
· prefer doing sth to doing sth
例：I prefer watching football to playing it.
· She is taller than I by three inches.
· There is one year between us.
· They have increased the price by 50%.
· what 引导主语从句
例：What surprised me is that everybody seemed to be very indifferent to her.
· what 引导宾语从句
例：We can learn what we do not know.
· too … to do …
例：Politics is too important to be left to the politicians.（=Politics is so important that it can\’t be left to the politicians.）
· too + adj + for sth
例：These shoes are much too small for me.
· where 引导的定语从句
例：This is the house where he lived last year.
· where 引导的状语从句
例：Where there is a will，there is a way.
· where 引导的表语从句
例：This is where you are wrong.
· before sb can/ could … 或人还没来得及……
例：Before I could get in a word ，he had measured me.
· It will be +时刻+ before + 还有多长时刻……
例：It will be 4 years before he graduates.
· had done some time before （才……）
例：We had sailed four days and four nights before we saw land.
· It is /was +被偏重有些+that（who）…
例：It was I who wrote to my uncle yesterday.
· Is/was it + 被偏重有些 + that （who） …
例：Was it your brother that you met in the street?
· would like to/ would love to have done sth.
例：I would like to have written to you.
· was / were going to do sth.（用曩昔将来时态标明原方案做啥）
例：Lucy was going to watch a basketball match.