区别 used to 和be used to do 的用法和意思?

used to 惯于；过去经常
He used to promenade his child along the seaside after supper.
过去他常在晚饭后带着孩子在海滨散步。
It used to celebrate the start of spring and new life.
它过去常常是庆祝春天和新生命的开始。
be used to do 被用来做…
Computers can be used to do many things.
电脑可用来做许多事。
I have these two certificates can be used to do field work?
我有这两个证书，到外地工作能用吗？

used to 表示过去常常做某事
意思是被用来做某事;be used to do

used to do 是指过去常常做某事，可以用在一般过去时
be used to doing是指习惯于做某事，可以用在一般时和过去时

used to 表示过去常常做某事、习惯于做.......
be used to do 是被动语态 。意思是被用来做某事;be used to do

1.used to do sth.过去常常做某事,(意思现在不做了)例:I used to get up early and take an hour's walk before breakfast.我过去常常起床很早并且在早餐前散步一小时.2.be used to doing sth / be used to sth .是...