今天与客户沟通时,我想表达我习惯了做某事,差点弄错了用法,特写出来强化下记忆。

used to do sth. 过去常常现在不了
eg: I used to eat so much meat, now I love fruit then it.

used to sth./used to doing sth. 习惯了(to是介词了,接名词或动名词)
eg: I used to getting up early every morning.

be used to do sth. 被用于(被动语态)
eg: Wechat is used to be the most common instant communication client software nowdays.