Present participle; Past participle - beginning - begun Present - begin - begin - begins - begin - begin - begin Past - began - began - began - began - began - began Future - will begin - will begin - will begin - will begin - will begin - will begin Present conditional - would begin - would begin - would begin - would begin - would begin - would begin Present Perfect - have begun - have begun - has begun - have begun - have begun - have begun Past Perfect - had begun - had begun - had begun - had begun - had begun - had begun Future Perfect - will have begun - will have begun - will have begun - will have begun - will have begun - will have begun Past conditional - would have begun - would have begun - would have begun - would have begun - would have begun - would have begun Imperative - - - begin - - - - - - - -