To (と）　～to~ = A and b in use noun as door mean in english ~no(の）mean belong For exmaple = watashi no hon ( my book = book belong to me ) use in noun means field Itte can be use in order = go away and speak out only way of found diference connection word like word with distination or hand language to show outbound direction means "go out/go away " case of speak out/ to say come after the question mostly. "yo" mean at first like a English "Hi" or "Hey" in greeting use by male and ~yo mainly female use to pull attention others for exmaple This rose is beautiful is not it (kono bara kirei yo) Use as noun mean world/society in English Ni use commomly forward diection ~ni = for~ other use in noun = baggage/cargo Modorenai =mean is to be not able to return / those examples common use in Japanese also other meaning can be found in Japanese

Japanese have many homonym. We distinguish it to use Kanji. If you cannot use Kanji, we judge mean by read whole sentence. So, I think it it will be better to write sentence. Well, "modorenai" is " can't go back".