现在常常做某事和过去常常做某事！！

现在常常做某事：i am used to do sth.
过去常常做某事：i was used to do sth.
竟然有这样的回答，真是笑死人了，哈哈。

sb be used to doing sth 习惯做某事
过去常常做某事，used to do sth.

used to do 过去常常做某事
used to doing 习惯于做某事

be used to 用来表示现在常常 好像还没有见过呢

sb used to do sth 过去常常做某事
sb be used to doing sth 现在常常做某事

现在常常做某事：i am used to do sth.
过去常常做某事：i was used to do sth.

used to do是过去常常，used to doing是习惯