Present participle; Past participle - crippling - crippled Present - cripple - cripple - cripples - cripple - cripple - cripple Past - crippled - crippled - crippled - crippled - crippled - crippled Future - will cripple - will cripple - will cripple - will cripple - will cripple - will cripple Present conditional - would cripple - would cripple - would cripple - would cripple - would cripple - would cripple Present Perfect - have crippled - have crippled - has crippled - have crippled - have crippled - have crippled Past Perfect - had crippled - had crippled - had crippled - had crippled - had crippled - had crippled Future Perfect - will have crippled - will have crippled - will have crippled - will have crippled - will have crippled - will have crippled Past conditional - would have crippled - would have crippled - would have crippled - would have crippled - would have crippled - would have crippled Imperative - - - cripple - - - - - - - -