Present participle; Past participle - classing - classed Present - class - class - classes - class - class - class Past - classed - classed - classed - classed - classed - classed Future - will class - will class - will class - will class - will class - will class Present conditional - would class - would class - would class - would class - would class - would class Present Perfect - have classed - have classed - has classed - have classed - have classed - have classed Past Perfect - had classed - had classed - had classed - had classed - had classed - had classed Future Perfect - will have classed - will have classed - will have classed - will have classed - will have classed - will have classed Past conditional - would have classed - would have classed - would have classed - would have classed - would have classed - would have classed Imperative - - - class - - - - - - - -