Used

 Used (AV) - Question Tag

Subject : The word 'used' can be used with all the subjects.

Affirmative: 1. He used to play in the garden, didn't he?

 Negative     :    He never used to play in the garden, did he?

"Use" as Main Verb

1. He uses his phone to click photos, doesn't he?

     He does not use his phone to click photos, does he?

2. They use their friend's cell phone, don't they?

     They do not use their friend's cell phone, do they?

3. You used your brain for a vain thing, didn't you?

     You did not use your brain for a vain thing, did you?