use 用法常見用法：
used to表示過去常常做某事.
例句:I used to play football after school.過去我常常在放學后踢球.
be used to do的意思是被用來做某事;be used to doing的意思是習慣于做某事.
used to 過去常常做某事
be used to 被用來做
used to / be used to （樓上的幾位請注意,be used for才是被用來做什么）
used to + do："過去常常"表示過去習慣性的動作或狀態,但如今已不存在.
Mother used not to be so forgetful.
Scarf used to take a walk.(過去常常散步)
be used to + doing：對……已感到習慣,或"習慣于",to是介詞,后需加名詞或動名詞.
He is used to a vegetarian diet.
Scarf is used to taking a walk.(現在習慣于散步)
used to / be used to
used to + do："過去常常"表示過去習慣性的動作或狀態,但如今已不存在.
Mother used not to be so forgetful.
Scarf used to take a walk.(過去常常散步)
be used to + doing：對……已感到習慣,或"習慣于",to是介詞,后需加名詞或動名詞.
He is used to a vegetarian diet.
Scarf is used to taking a walk.(現在習慣于散步)