I must welter you must welter she must welter we must welter you must welter they must welter
Forma con V-ing
I must be weltering you must be weltering she must be weltering we must be weltering you must be weltering they must be weltering
Perfecto
I must have weltered you must have weltered she must have weltered we must have weltered you must have weltered they must have weltered
Perfecto con V-ing
I must have been weltering you must have been weltering she must have been weltering we must have been weltering you must have been weltering they must have been weltering
Negación
Forma simple
I must not welter you must not welter she must not welter we must not welter you must not welter they must not welter
Forma con V-ing
I must not be weltering you must not be weltering she must not be weltering we must not be weltering you must not be weltering they must not be weltering
Perfecto
I must not have weltered you must not have weltered she must not have weltered we must not have weltered you must not have weltered they must not have weltered
Perfecto con V-ing
I must not have been weltering you must not have been weltering she must not have been weltering we must not have been weltering you must not have been weltering they must not have been weltering
Forma interrogativa
Forma simple
must I welter? must you welter? must she welter? must we welter? must you welter? must they welter?
Forma con V-ing
must I be weltering? must you be weltering? must she be weltering? must we be weltering? must you be weltering? must they be weltering?
Perfecto
must I have weltered? must you have weltered? must she have weltered? must we have weltered? must you have weltered? must they have weltered?
Perfecto con V-ing
must I have been weltering? must you have been weltering? must she have been weltering? must we have been weltering? must you have been weltering? must they have been weltering?
Forma interro-negativa
Forma simple
must I not welter? must you not welter? must she not welter? must we not welter? must you not welter? must they not welter?
Forma con V-ing
must I not be weltering? must you not be weltering? must she not be weltering? must we not be weltering? must you not be weltering? must they not be weltering?
Perfecto
must I not have weltered? must you not have weltered? must she not have weltered? must we not have weltered? must you not have weltered? must they not have weltered?
Perfecto con V-ing
must I not have been weltering? must you not have been weltering? must she not have been weltering? must we not have been weltering? must you not have been weltering? must they not have been weltering?