Sentence:  After he had been away from home about a year he wrote : `` [ Dear Wife ] If I did <WSD>not</WSD> write and receive letters from you I believe that I would forgit that I was married I do n't feel much like a maryed man but I never forgit it sofar as to court enny other lady but if I should you must forgive me as I am so forgitful '' . 
Meaning of the word marked with <WSD> tags:  negation of a word or group of words