Another question about used to does exist here. But this question is slightly different. It concerns with two types.
Which is more appropriate?
First, doing or do?
Second, were or did?
Which of the following types of usage is/are correct?
----Were you
used to doingthisor----Were you
used to dothis?----
Didyou use to....or ---
Wereyou used to... (as above)
Please give a detailed explanation.