Present participle; Past participle - lettering - lettered Present - letter - letter - letters - letter - letter - letter Past - lettered - lettered - lettered - lettered - lettered - lettered Future - will letter - will letter - will letter - will letter - will letter - will letter Present conditional - would letter - would letter - would letter - would letter - would letter - would letter Present Perfect - have lettered - have lettered - has lettered - have lettered - have lettered - have lettered Past Perfect - had lettered - had lettered - had lettered - had lettered - had lettered - had lettered Future Perfect - will have lettered - will have lettered - will have lettered - will have lettered - will have lettered - will have lettered Past conditional - would have lettered - would have lettered - would have lettered - would have lettered - would have lettered - would have lettered Imperative - - - letter - - - - - - - -