please correct these lines

I should meet him. Should I meet him? I should not meet him. Should I not meet him?

Should I happen to meet him should I or should I not greet him, beat him defeat him complete him?

What should I do?  What would you do in my shoes?   

Nothing to correct - but note the inverted subjunctive use of should in 'should I happen to meet'

please correct these lines

I should meet him. Should I meet him? I should not meet him. Should I not meet him?

Only the issue of one space after punctuation - otherwise okay.  You could also say "shouldn't" instead of should not, which sounds very formal.