Present participle; Past participle - thinking - thought Present - think - think - thinks - think - think - think Past - thought - thought - thought - thought - thought - thought Future - will think - will think - will think - will think - will think - will think Present conditional - would think - would think - would think - would think - would think - would think Present Perfect - have thought - have thought - has thought - have thought - have thought - have thought Past Perfect - had thought - had thought - had thought - had thought - had thought - had thought Future Perfect - will have thought - will have thought - will have thought - will have thought - will have thought - will have thought Past conditional - would have thought - would have thought - would have thought - would have thought - would have thought - would have thought Imperative - - - think - - - - - - - -