ues的用法

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)
典型例题
---- Your phone number again? I ___ quite catch it.
---- It's 69568442.
A. didn't B. couldn't C. don't D. can't
答案A. 本句虽没有明确的时间状语,但从语意上看 出,在听的时候没有听懂这个动作发生在过去,因此应用过去时.