This is the only occasion where "e" and "ni" can be interchanged, so you would never say "Isu '''e''' suwatte imasu." for "I am sitting ''on'' the chair" (Isu '''ni''' suwatte imasu), otherwise you are saying, "I am sitting ''to'' the chair." | This is the only occasion where "e" and "ni" can be interchanged, so you would never say "Isu '''e''' suwatte imasu." for "I am sitting ''on'' the chair" (Isu '''ni''' suwatte imasu), otherwise you are saying, "I am sitting ''to'' the chair." |