详细内容

• 01

  used to do 表示过去常常做某件事，be used to doing 表示习惯于做某事。

• 02

  be used to与accustomed to在结构上相同，都表示”习惯于“，used是形容词，to是介词，只能接跟名词、代词或动名词，通常采用"ing"形式。例：He was used to the cold weather after he lived there for two years．
  
  1）They got used to living in the countryside．他们已习惯于住在农村。

  
• 03

  used to do中to跟动词原形，不需变换形态。例：We used to go there every year.