Present participle; Past participle - circulating - circulated Present - circulate - circulate - circulates - circulate - circulate - circulate Past - circulated - circulated - circulated - circulated - circulated - circulated Future - will circulate - will circulate - will circulate - will circulate - will circulate - will circulate Present conditional - would circulate - would circulate - would circulate - would circulate - would circulate - would circulate Present Perfect - have circulated - have circulated - has circulated - have circulated - have circulated - have circulated Past Perfect - had circulated - had circulated - had circulated - had circulated - had circulated - had circulated Future Perfect - will have circulated - will have circulated - will have circulated - will have circulated - will have circulated - will have circulated Past conditional - would have circulated - would have circulated - would have circulated - would have circulated - would have circulated - would have circulated Imperative - - - circulate - - - - - - - -