1、as 句型：
  (1) as引导方式状语从句句型：“按照……；正如……”
     例：We do farm work as the old peasant teaches us. 
         As(it is)in your country, we grow wheat in the north and rice in the south.    正如(像) 你们国家一样，我们北方种植小麦，南方种植水稻。
(2) as＋形容词／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．
         他和他姐姐一样是位优秀的运动员。
(3) such + n. + as to do 如此……以致于……
     例：She is such a fool as to believe what he said.
         她是一个如此的一个笨蛋以致相信了他所说的话。
(4) so + adj./adv. + as to do sth 如此……以致于……
     例：He was so strong as to carry the heavy box.
         他是如此的强壮以致于能提起那重箱子。
  (5) 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.
         他希望成为一个像雷锋这样的人。
  (6) the same ＋名词＋as 和……一样的…… （接名词或定语从句）
     例：He is not the same man as he used to be 他不是从前的那样子了。
  (7) as 引导非限制性定语从句
     例：As is known to us, knowledge is power.众所周知，知识就是力量。
  (8)引导时间状语从句。与while意义相近
     例：We get wiser as we get older. 随着我们长大，我们也变得越来越聪明。
  (9) 引导原因状语从句，与because的用法相近
     例：As it was getting very late, we soon turned back.
         因为越来越迟了，所以我们不久就回来了。
  (10) 引导让步状语从句
     例：Child as he is, he knows much about science.
         尽管他是一个小孩，但他对科学了解得很多。
2、prefer 句型：
  (1) prefer to do sth
     例：I prefer to stay at home.   我宁愿呆在家里。
  (2) prefer doing sth
     例：I prefer playing in defence.   我喜欢打防守。
  (3) prefer sb to do sth
     例：Would you prefer me to stay?  你愿意我留下来吗？
  (4) prefer to do sth rather than do sth  ……宁愿…...而不愿.…".
     例句：I prefer to stay at home rather than go out
           我宁愿呆在家里而不愿出去.
  (5) prefer doing sth to doing sth
     例：I prefer watching football to playing it. 
         我喜欢看篮球，不喜欢打篮球。
  (6) prefer sth to sth
     例：I prefer tea to coffee.   我要茶不要咖啡。
3、when 句型：
  (1) be doing sth ---- when ---
     例：He was still smiling when the door opened and his wife came in.
         他正笑着的时候门突然开了，他妻子走了进来。
  (2) be about to do sth --- when ---
     例：We were about to start when it began to rain.
         我们刚要出发，天就开始下雨了。
  (3) had not done sth --- when ---/ hardly --- when ---
     例： He had not fallen asleep when the telephone rang.
          他刚要入睡电话就响了。
  (4) had just done ---- when ---
     例：I had just gone to bed after a very hard day when the phone rang.
         在劳累了一天之后我刚刚就寝，电话铃就响了。
4、seem 句型：
  (1) It +seems + that从句
     例：It seemed that everyone was satisfied.  看来好像每个人都很满意。
  (2) It seems to sb that ---
     例：It seems to me that she is right.   我看她是对的，
  (3) There seems to be ----
     例：There seems to be a heavy rain.   看上去要有一场大雨。
  (4) It seems as if ----
     例：It seemed that she couldn't come to class.看样子她不能来上课了。
5、表示“相差……；增加了……；增加到……”句型：
   (1) She is taller than I by three inches. 她比我高三英寸
   (2) There is one year between us. 我们之间相差一岁。
   (3)  She is three years old than I  她比我大三岁。
   (4) They have increased the price by 50%. 他们把价格上涨了50%
6、what 引导的名词性从句
  (1) what 引导主语从句
     例：What surprised me is that everybody seemed to be very indifferent to her.
  让我吃惊的是每个人似乎对她都很冷淡.
[ indifferent adj.不关心的;冷漠的]
  (2) what 引导宾语从句
     例：We can learn what we do not know. 我们能学会我们不懂的东西。
  (3) what 引导表语从句
     例：That is what I want.   那正是我所要的。
  (4) what 引导同位语从句
     例：I have no idea what they are talking about. 我不知道他们正在谈论什么.
7、too句型：
  (1) too．．．to do sth．
     例：Politics is too important to be left to the politicians．
        （＝Politics is so important that it can't be left to the politicians．）
          政治太重要了，不能由政治家来决定。
  (2) only too --- to do sth
     例：I shall be only too pleased to get home.  我要回到家里就非常高兴。
  (3) too + adj + for sth
     例：These shoes are much too small for me.  我穿这双鞋太小了。
  (4) too + adj + a + n.
     例：This is too difficult a text for me.   这篇课文对我来说太难了。
  (5)  can't … too +形容词     无论……也不为过
     例：We cannot emphasize the importance of protecting our eyes too much.
  我们再怎么强调保护眼睛的重要性也不为过。
8、where  句型：
  (1) where 引导的定语从句
     例：This is the house where he lived last year. 这就是他去年住过的房子。
  (2) where 引导的状语从句
     例：Where there is a will，there is a way．有志者事竟成。
         He left his key where he could find．他将钥匙放在易找到的地方。
         I will go where I want to go．我要去我想去的地方。
  (3) where  引导的表语从句
     例：This is where you are wrong.   这正是你错的地方。
     注：引导状语从句的where= 介词+the place where （定语从句）
         例：Go where(ver) you are most needed.到最需要你的地方去。

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