I must perch you must perch she must perch we must perch you must perch they must perch
Forma con V-ing
I must be perching you must be perching she must be perching we must be perching you must be perching they must be perching
Perfecto
I must have perched you must have perched she must have perched we must have perched you must have perched they must have perched
Perfecto con V-ing
I must have been perching you must have been perching she must have been perching we must have been perching you must have been perching they must have been perching
Negación
Forma simple
I must not perch you must not perch she must not perch we must not perch you must not perch they must not perch
Forma con V-ing
I must not be perching you must not be perching she must not be perching we must not be perching you must not be perching they must not be perching
Perfecto
I must not have perched you must not have perched she must not have perched we must not have perched you must not have perched they must not have perched
Perfecto con V-ing
I must not have been perching you must not have been perching she must not have been perching we must not have been perching you must not have been perching they must not have been perching
Forma interrogativa
Forma simple
must I perch? must you perch? must she perch? must we perch? must you perch? must they perch?
Forma con V-ing
must I be perching? must you be perching? must she be perching? must we be perching? must you be perching? must they be perching?
Perfecto
must I have perched? must you have perched? must she have perched? must we have perched? must you have perched? must they have perched?
Perfecto con V-ing
must I have been perching? must you have been perching? must she have been perching? must we have been perching? must you have been perching? must they have been perching?
Forma interro-negativa
Forma simple
must I not perch? must you not perch? must she not perch? must we not perch? must you not perch? must they not perch?
Forma con V-ing
must I not be perching? must you not be perching? must she not be perching? must we not be perching? must you not be perching? must they not be perching?
Perfecto
must I not have perched? must you not have perched? must she not have perched? must we not have perched? must you not have perched? must they not have perched?
Perfecto con V-ing
must I not have been perching? must you not have been perching? must she not have been perching? must we not have been perching? must you not have been perching? must they not have been perching?