Present participle; Past participle - tanking - tanked Present - tank - tank - tanks - tank - tank - tank Past - tanked - tanked - tanked - tanked - tanked - tanked Future - will tank - will tank - will tank - will tank - will tank - will tank Present conditional - would tank - would tank - would tank - would tank - would tank - would tank Present Perfect - have tanked - have tanked - has tanked - have tanked - have tanked - have tanked Past Perfect - had tanked - had tanked - had tanked - had tanked - had tanked - had tanked Future Perfect - will have tanked - will have tanked - will have tanked - will have tanked - will have tanked - will have tanked Past conditional - would have tanked - would have tanked - would have tanked - would have tanked - would have tanked - would have tanked Imperative - - - tank - - - - - - - -