Present participle; Past participle - illustrating - illustrated Present - illustrate - illustrate - illustrates - illustrate - illustrate - illustrate Past - illustrated - illustrated - illustrated - illustrated - illustrated - illustrated Future - will illustrate - will illustrate - will illustrate - will illustrate - will illustrate - will illustrate Present conditional - would illustrate - would illustrate - would illustrate - would illustrate - would illustrate - would illustrate Present Perfect - have illustrated - have illustrated - has illustrated - have illustrated - have illustrated - have illustrated Past Perfect - had illustrated - had illustrated - had illustrated - had illustrated - had illustrated - had illustrated Future Perfect - will have illustrated - will have illustrated - will have illustrated - will have illustrated - will have illustrated - will have illustrated Past conditional - would have illustrated - would have illustrated - would have illustrated - would have illustrated - would have illustrated - would have illustrated Imperative - - - illustrate - - - - - - - -