被动语态

• 生词

  acknowledge 承认
  claim 宣称;声称;断言
  figure 数字
  accurate 准确的
  beat 击败

• 短语

  ought to be done 理应被做某事
  act upon = act on 采取行动
  account for 解释;占比
  bring about 引起;导致
  think over 仔细考虑
  work out 解决;锻炼;想出;计算出
  break in upon 闯入
  look up to 受人敬仰

• 语法

  must do 对现在情况的肯定推测
  must have done 对过去情况的肯定推测
  have sth. done 让别人做某事
  I have my hair cut.
  make,let,have 使役动词
  hear,watch,feel,notice 感官动词
  x sb. do sth.
  see sb. do sth. 看见某人做某事（从头到尾）
  see sb. doing sth. 看见某人正在做某事
  get+过去分词的被动语态,常表示动作的结果，有最后，终于，突然发生的意义。非延续性含义。
  Finally the car got repaired.
  want,need,desire,require doing sth. 主动形式表示被动.
  The house wants repairing.
  be worth doing 某事某物值得被做.
  clean等某些动词主动句型表被动含义。
  clean,wash,write,read,sell,wear,iron,keep,cut 表示很好清理,很好写