Present, Future っぽい is [x] っぽくない is not [x] Past っぽかった was [x] っぽくなかった was not [x] Te-form, Continuative っぽくて is [x] and... っぽくなくて is not [x] and... Provisional っぽければ if it is [x] っぽくなければ if it is not [x] Conditional っぽかったら when/if it is [x] っぽくなかったら when/if it is not [x] Adverbial っぽく [x]-ly Noun form っぽさ [x]-ness