1. He either should have stayed at home or gone to the pub. 2. He either should have stayed at home or he should have gone to the pub. 3. He neither went to the pub, nor to the casino. 4. He did not go to the pub, nor did he go to the casino. 5. He went to the park or he went to the garden. 6. He went to the park, or he went to the garden. Are these sentences correct? Mainly, I wonder if the comma in front of “nor,” in 3rd sentence can be omitted, and also, is it required in 4th sentence? Ms Word doesn’t let me to put comma in 1st and 2nd sentence, but has nothing against a comma in 5th and 6th line. I placed one nonetheless in the last sentence.