人教版高中英语必修四Unit 3要点梳理8-18
8. up to now直到现在
  (1)up to now意为“直到现在”，常与现在完成时连用，可放于句首、句尾或句中。
  (2)up to now的同义词组有up to present, so far, till now等
  知识拓展
  up to还有以下意思。
① I can take up to four people in my car.(至多)
② Where to spend your holiday is up to you.(取决于)  be up to sb
③ Even though he's not up to the work, he still wants to do it.(胜任) be up yo (doing) sh
④ What are the children up to now？(忙于) 
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9. badly off穷的；缺少的
  知识拓展
  (1)be badly off for sth.某物短缺；……不够   be worse off更穷的
  (2)be well off有钱；富裕；境况良好
  be well off for sth.……充裕    be better off境况较好
  名师点拨
(1) be badly off for sth.同义于be short of/be lacking in。
(2) badly off的比较级是worse off，意为“境况更差”。
(3) well off的比较级是better off，意为“更富裕/有”。

10. pick out
  (1)精心挑选   Have you picked out the movie you want to see? 你选好你想看的电影了吗？
  (2)辨别出；认出来  He could easily pick out his old friend among the crowd though they hadn't seen each other for a 
  long time.
  pick up拾起；捡起；(无意中)学会；见到；收听到；搭载；使人恢复精神；(便宜地)买

11. cut off切断，断绝
  ①He cut off some branches from the tree.他从树上剪掉几根树枝。
  ②They cut off the gas supply.他们停止了煤气供应。
  cut down砍倒；减少，缩减；改小或缩短(衣服)   cut out切去，剪下；删去；中断
  cut across 抄近路穿过   cut away切去，剪去，切成，剪成；迅速离开
  cut in/into插嘴；插入   cut up切碎；使痛苦

12. star in在……担任主角；主演
  Who is starring in the film at the local cinema? 本地那家电影院上演的那部片子是谁主演的？
  知识拓展
(1) star as...担任……角色
(2) star vt. 以……为主角；由……主演
  n. (电影、体育等的) 明星；杰出人物
  E.g. The actress is starring as Mother of the family in the play.
  E.g. The new play stars three of Britain's best actors.这部新戏由英国最出色的三位演员主演。

13.Particular adj  particularly adv    be particular about 对。。挑剔
14.Occasion  on this|that occasion    occasionally adv
15 amuse v   amused adj  amusing adj  amusement n
16 whisper   in a whisper
17 react v  reaction n     react to

18. as多用于固定搭配中：
  as is often the case这是常有的事
  as was expected正如所预料的那样
  as often happens正如经常发生的那样
  as is known to all众所周知
  as has been said before如上所述
  as is mentioned above正如上面所提到的
  As (conj.)随着，常用来引导时间状语从句   as time goes by 
  With(prep.)随着，后接名词或复合宾语，不引导从句 with time going by

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