Regular verb: flutter - fluttered - fluttered
Simple form | V-ing form |
I must flutter you must flutter he must flutter we must flutter you must flutter they must flutter | I must be fluttering you must be fluttering he must be fluttering we must be fluttering you must be fluttering they must be fluttering |
Perfect | V-ing perfect |
I must have fluttered you must have fluttered he must have fluttered we must have fluttered you must have fluttered they must have fluttered | I must have been fluttering you must have been fluttering he must have been fluttering we must have been fluttering you must have been fluttering they must have been fluttering |
Simple form | V-ing form |
I mustn't flutter you mustn't flutter he mustn't flutter we mustn't flutter you mustn't flutter they mustn't flutter | I mustn't be fluttering you mustn't be fluttering he mustn't be fluttering we mustn't be fluttering you mustn't be fluttering they mustn't be fluttering |
Perfect | V-ing perfect |
I mustn't have fluttered you mustn't have fluttered he mustn't have fluttered we mustn't have fluttered you mustn't have fluttered they mustn't have fluttered | I mustn't have been fluttering you mustn't have been fluttering he mustn't have been fluttering we mustn't have been fluttering you mustn't have been fluttering they mustn't have been fluttering |
Simple form | V-ing form |
must I flutter? must you flutter? must he flutter? must we flutter? must you flutter? must they flutter? | must I be fluttering? must you be fluttering? must he be fluttering? must we be fluttering? must you be fluttering? must they be fluttering? |
Perfect | V-ing perfect |
must I have fluttered? must you have fluttered? must he have fluttered? must we have fluttered? must you have fluttered? must they have fluttered? | must I have been fluttering? must you have been fluttering? must he have been fluttering? must we have been fluttering? must you have been fluttering? must they have been fluttering? |
Simple form | V-ing form |
mustn't I flutter? mustn't you flutter? mustn't he flutter? mustn't we flutter? mustn't you flutter? mustn't they flutter? | mustn't I be fluttering? mustn't you be fluttering? mustn't he be fluttering? mustn't we be fluttering? mustn't you be fluttering? mustn't they be fluttering? |
Perfect | V-ing perfect |
mustn't I have fluttered? mustn't you have fluttered? mustn't he have fluttered? mustn't we have fluttered? mustn't you have fluttered? mustn't they have fluttered? | mustn't I have been fluttering? mustn't you have been fluttering? mustn't he have been fluttering? mustn't we have been fluttering? mustn't you have been fluttering? mustn't they have been fluttering? |