1. I don’t know what Bill shouldn’t have been proud of, but I have a good idea about what he should.
2. I don’t know what Bill shouldn’t have been proud of, but I have a good idea about what he should have.
3. I don’t know what Bill shouldn’t have been proud of, but I have a good idea about what he should have been.
Thank you.
I think number 2 is corrrect.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.