
Regular verb: flight - flighted - flighted
Simple form | V-ing form | 
| I must flight you must flight she must flight we must flight you must flight they must flight  | I must be flighting you must be flighting she must be flighting we must be flighting you must be flighting they must be flighting  | 
Perfect | V-ing perfect | 
| I must have flighted you must have flighted she must have flighted we must have flighted you must have flighted they must have flighted  | I must have been flighting you must have been flighting she must have been flighting we must have been flighting you must have been flighting they must have been flighting  | 
Simple form | V-ing form | 
| I mustn't flight you mustn't flight she mustn't flight we mustn't flight you mustn't flight they mustn't flight  | I mustn't be flighting you mustn't be flighting she mustn't be flighting we mustn't be flighting you mustn't be flighting they mustn't be flighting  | 
Perfect | V-ing perfect | 
| I mustn't have flighted you mustn't have flighted she mustn't have flighted we mustn't have flighted you mustn't have flighted they mustn't have flighted  | I mustn't have been flighting you mustn't have been flighting she mustn't have been flighting we mustn't have been flighting you mustn't have been flighting they mustn't have been flighting  | 
Simple form | V-ing form | 
| must I flight? must you flight? must she flight? must we flight? must you flight? must they flight?  | must I be flighting? must you be flighting? must she be flighting? must we be flighting? must you be flighting? must they be flighting?  | 
Perfect | V-ing perfect | 
| must I have flighted? must you have flighted? must she have flighted? must we have flighted? must you have flighted? must they have flighted?  | must I have been flighting? must you have been flighting? must she have been flighting? must we have been flighting? must you have been flighting? must they have been flighting?  | 
Simple form | V-ing form | 
| mustn't I flight? mustn't you flight? mustn't she flight? mustn't we flight? mustn't you flight? mustn't they flight?  | mustn't I be flighting? mustn't you be flighting? mustn't she be flighting? mustn't we be flighting? mustn't you be flighting? mustn't they be flighting?  | 
Perfect | V-ing perfect | 
| mustn't I have flighted? mustn't you have flighted? mustn't she have flighted? mustn't we have flighted? mustn't you have flighted? mustn't they have flighted?  | mustn't I have been flighting? mustn't you have been flighting? mustn't she have been flighting? mustn't we have been flighting? mustn't you have been flighting? mustn't they have been flighting?  |