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Message: <blockquote data-quote="Katjov" data-source="post: 794144" data-attributes="member: 70906">Hi thereI've been wondering how one would say "I have/have not (done that)" in Japanese. For example:A: "Have you eaten my lunch?"B: "I have not"I've come across the phrase "shitenai" (or "shittenai" as I'm not sure how you spell it) which apparently translates to "I have not". The problem is that I don't know how it is derived. Could someone tell me how it's been derived from the verb "suru"?*EDIT*I have thought about it for a moment and tried a few combinations on google translate with a few verbs. Turns out that you can say "I have not (done) xxx" by conjugating the verb into its TE-form and adding "nai". I'm still confused though on how you'd say "I have (done) xxx" (e.g "I've have seen it"). Would you simply conjugate the verb into past tense? If not, then please tell how I'm supposed to conjuagte it</blockquote>