I must solve you must solve she must solve we must solve you must solve they must solve
Forma com V-ing
I must be solving you must be solving she must be solving we must be solving you must be solving they must be solving
Perfeito
I must have solved you must have solved she must have solved we must have solved you must have solved they must have solved
Perfeito com V-ing
I must have been solving you must have been solving she must have been solving we must have been solving you must have been solving they must have been solving
Negação
Forma simple
I must not solve you must not solve she must not solve we must not solve you must not solve they must not solve
Forma com V-ing
I must not be solving you must not be solving she must not be solving we must not be solving you must not be solving they must not be solving
Perfeito
I must not have solved you must not have solved she must not have solved we must not have solved you must not have solved they must not have solved
Perfeito com V-ing
I must not have been solving you must not have been solving she must not have been solving we must not have been solving you must not have been solving they must not have been solving
Forma interrogativa
Forma simple
must I solve? must you solve? must she solve? must we solve? must you solve? must they solve?
Forma com V-ing
must I be solving? must you be solving? must she be solving? must we be solving? must you be solving? must they be solving?
Perfeito
must I have solved? must you have solved? must she have solved? must we have solved? must you have solved? must they have solved?
Perfeito com V-ing
must I have been solving? must you have been solving? must she have been solving? must we have been solving? must you have been solving? must they have been solving?
Forma interro-Negação
Forma simple
must I not solve? must you not solve? must she not solve? must we not solve? must you not solve? must they not solve?
Forma com V-ing
must I not be solving? must you not be solving? must she not be solving? must we not be solving? must you not be solving? must they not be solving?
Perfeito
must I not have solved? must you not have solved? must she not have solved? must we not have solved? must you not have solved? must they not have solved?
Perfeito com V-ing
must I not have been solving? must you not have been solving? must she not have been solving? must we not have been solving? must you not have been solving? must they not have been solving?