|used to vs used to do||
Used to can be used as an adjective and we use it to talk about things that have become familiar, and are no longer strange or new.
For example: "I am used to mistakes now."
You can also be used to doing something.
For example: "I am used to making mistakes now."
Used to do - If we say something used to happen we are talking about repeated events and actions in the past, usually things that happened a long time ago and are now finished.
For example: "I used to smoke."