Present participle; Past participle - nibbling - nibbled Present - nibble - nibble - nibbles - nibble - nibble - nibble Past - nibbled - nibbled - nibbled - nibbled - nibbled - nibbled Future - will nibble - will nibble - will nibble - will nibble - will nibble - will nibble Present conditional - would nibble - would nibble - would nibble - would nibble - would nibble - would nibble Present Perfect - have nibbled - have nibbled - has nibbled - have nibbled - have nibbled - have nibbled Past Perfect - had nibbled - had nibbled - had nibbled - had nibbled - had nibbled - had nibbled Future Perfect - will have nibbled - will have nibbled - will have nibbled - will have nibbled - will have nibbled - will have nibbled Past conditional - would have nibbled - would have nibbled - would have nibbled - would have nibbled - would have nibbled - would have nibbled Imperative - - - nibble - - - - - - - -