I must skitter you must skitter she must skitter we must skitter you must skitter they must skitter
Forma com V-ing
I must be skittering you must be skittering she must be skittering we must be skittering you must be skittering they must be skittering
Perfeito
I must have skittered you must have skittered she must have skittered we must have skittered you must have skittered they must have skittered
Perfeito com V-ing
I must have been skittering you must have been skittering she must have been skittering we must have been skittering you must have been skittering they must have been skittering
Negação
Forma simple
I must not skitter you must not skitter she must not skitter we must not skitter you must not skitter they must not skitter
Forma com V-ing
I must not be skittering you must not be skittering she must not be skittering we must not be skittering you must not be skittering they must not be skittering
Perfeito
I must not have skittered you must not have skittered she must not have skittered we must not have skittered you must not have skittered they must not have skittered
Perfeito com V-ing
I must not have been skittering you must not have been skittering she must not have been skittering we must not have been skittering you must not have been skittering they must not have been skittering
Forma interrogativa
Forma simple
must I skitter? must you skitter? must she skitter? must we skitter? must you skitter? must they skitter?
Forma com V-ing
must I be skittering? must you be skittering? must she be skittering? must we be skittering? must you be skittering? must they be skittering?
Perfeito
must I have skittered? must you have skittered? must she have skittered? must we have skittered? must you have skittered? must they have skittered?
Perfeito com V-ing
must I have been skittering? must you have been skittering? must she have been skittering? must we have been skittering? must you have been skittering? must they have been skittering?
Forma interro-Negação
Forma simple
must I not skitter? must you not skitter? must she not skitter? must we not skitter? must you not skitter? must they not skitter?
Forma com V-ing
must I not be skittering? must you not be skittering? must she not be skittering? must we not be skittering? must you not be skittering? must they not be skittering?
Perfeito
must I not have skittered? must you not have skittered? must she not have skittered? must we not have skittered? must you not have skittered? must they not have skittered?
Perfeito com V-ing
must I not have been skittering? must you not have been skittering? must she not have been skittering? must we not have been skittering? must you not have been skittering? must they not have been skittering?