弯管机抽芯棒:be used to doing是过去常常，还是现在常常，还是什么别的？

be used to doing是过去常常，还是现在常常，还是什么别的？ be used to doing sth? used to do,be used to do,used to doing,be used to doing的区别 get/be used to doing used to do /be used to do的区别 be used to doing 与 have got used to doing 有什么区别 请给我讲讲be used to doing/be used to do的区别 be used to sb's doing是什么意思啊! 请教used to do和be used to doing的区别 有无‘be used doing ’句型？ used to doing的用法