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。