use 用法常见用法：
used to表示过去常常做某事.
例句:I used to play football after school.过去我常常在放学后踢球.
be used to do的意思是被用来做某事;be used to doing的意思是习惯于做某事.
used to 过去常常做某事
be used to 被用来做
used to / be used to （楼上的几位请注意,be used for才是被用来做什么）
used to + do："过去常常"表示过去习惯性的动作或状态,但如今已不存在.
Mother used not to be so forgetful.
Scarf used to take a walk.(过去常常散步)
be used to + doing：对……已感到习惯,或"习惯于",to是介词,后需加名词或动名词.
He is used to a vegetarian diet.
Scarf is used to taking a walk.(现在习惯于散步)
used to / be used to
used to + do："过去常常"表示过去习惯性的动作或状态,但如今已不存在.
Mother used not to be so forgetful.
Scarf used to take a walk.(过去常常散步)
be used to + doing：对……已感到习惯,或"习惯于",to是介词,后需加名词或动名词.
He is used to a vegetarian diet.
Scarf is used to taking a walk.(现在习惯于散步)