Question

1. Where are your manners?
2. Where is your manners?
(Which one is correct?)

3. He has good manners.
3-1. He has a good manner.
4. he has bad manners.
4-1 He has a bad manner.
5. You should learn table manners.
6. He has no manners.
6-1. He has no manner.
(Which ones are ungrammatical?)

Answer 1

1, 3, 4 (with a capital H at the beginning), 5, and 6 are correct.