People used to care

http://www.englishpage.com/verbpage/verbs3.htm https://www.ego4u.com/en/cram-up/grammar/simpas-pasper

So what did you use to do?
Revise here.

What were you doing at 8.20pm last night?
Revise the Past Continuous here

So, what had happened before? Study and Prqactice the Past Perfect simple and continuous here and here

Let's sing!