I used to __a cup of tea after dinner,but now I am used to__ it before dinner.请问前面的used to 和后面的be used to 有什么区别,分别应怎么填?

I used to [ have ] a cup of tea after dinner,but now I am used to [ having ] it before dinner.
翻译：我过去常常晚饭后喝杯茶,当现在我习惯在饭前喝一杯茶
如果给的是 动词have ,就用 have 和 having
如果是给动词 drink,就用 drink 和drinking
used to do sth.过去常常,后跟动词原形
be used to doing sth.习惯做某事