8.5 cease doing/to do
?
cease to do  長時間,甚至永遠停做某事。
cease doing  短時停止做某事,以后還會接著做。

  That department has ceased to exist forever.
  那個部門已不復(fù)存在。
  The girls ceased chatting for a moment when their teacher passed by.
  姑娘們在老師走過時,停了會聊天。