• he didn't used to do sg, he used not to do sg, he usedn't to do sg, he usen't to do sg
• he didn't used to do sg, he used not to do sg, he usedn't to do sg, he usen't to do sg
• have sg done, to get sg done
• well, you are a beauty!
• who the dash has done that?
• I have had my fling in my salad days
• I did not do it any more than you did