Tim Chase on Nostr: nprofile1q…p2uaj awake at ~3am, my mind started mulling the English oddity that we ...

nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqhvzjvzfmclu5l5zk65fxye5cgt7e0qvs6rcn60z72v9hy79mmpzqfp2uaj (nprofile…2uaj) awake at ~3am, my mind started mulling the English oddity that we have some to-be contractions ("isn't", "wasn't", etc), but some seem excluded for reasons I don't get. Why not "ben't" or "beingn't" or "amn't" or "beenn't"

I amn't understanding why, and want to ben't as confused 😉 Do you have any insights?