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