I must descale you must descale he must descale we must descale you must descale they must descale
Forma com V-ing
I must be descaling you must be descaling he must be descaling we must be descaling you must be descaling they must be descaling
Perfeito
I must have descaled you must have descaled he must have descaled we must have descaled you must have descaled they must have descaled
Perfeito com V-ing
I must have been descaling you must have been descaling he must have been descaling we must have been descaling you must have been descaling they must have been descaling
Negação
Forma simple
I must not descale you must not descale he must not descale we must not descale you must not descale they must not descale
Forma com V-ing
I must not be descaling you must not be descaling he must not be descaling we must not be descaling you must not be descaling they must not be descaling
Perfeito
I must not have descaled you must not have descaled he must not have descaled we must not have descaled you must not have descaled they must not have descaled
Perfeito com V-ing
I must not have been descaling you must not have been descaling he must not have been descaling we must not have been descaling you must not have been descaling they must not have been descaling
Forma interrogativa
Forma simple
must I descale? must you descale? must he descale? must we descale? must you descale? must they descale?
Forma com V-ing
must I be descaling? must you be descaling? must he be descaling? must we be descaling? must you be descaling? must they be descaling?
Perfeito
must I have descaled? must you have descaled? must he have descaled? must we have descaled? must you have descaled? must they have descaled?
Perfeito com V-ing
must I have been descaling? must you have been descaling? must he have been descaling? must we have been descaling? must you have been descaling? must they have been descaling?
Forma interro-Negação
Forma simple
must I not descale? must you not descale? must he not descale? must we not descale? must you not descale? must they not descale?
Forma com V-ing
must I not be descaling? must you not be descaling? must he not be descaling? must we not be descaling? must you not be descaling? must they not be descaling?
Perfeito
must I not have descaled? must you not have descaled? must he not have descaled? must we not have descaled? must you not have descaled? must they not have descaled?
Perfeito com V-ing
must I not have been descaling? must you not have been descaling? must he not have been descaling? must we not have been descaling? must you not have been descaling? must they not have been descaling?