I must burble you must burble he must burble we must burble you must burble they must burble
Forma con V-ing
I must be burbling you must be burbling he must be burbling we must be burbling you must be burbling they must be burbling
Perfecto
I must have burbled you must have burbled he must have burbled we must have burbled you must have burbled they must have burbled
Perfecto con V-ing
I must have been burbling you must have been burbling he must have been burbling we must have been burbling you must have been burbling they must have been burbling
Negación
Forma simple
I must not burble you must not burble he must not burble we must not burble you must not burble they must not burble
Forma con V-ing
I must not be burbling you must not be burbling he must not be burbling we must not be burbling you must not be burbling they must not be burbling
Perfecto
I must not have burbled you must not have burbled he must not have burbled we must not have burbled you must not have burbled they must not have burbled
Perfecto con V-ing
I must not have been burbling you must not have been burbling he must not have been burbling we must not have been burbling you must not have been burbling they must not have been burbling
Forma interrogativa
Forma simple
must I burble? must you burble? must he burble? must we burble? must you burble? must they burble?
Forma con V-ing
must I be burbling? must you be burbling? must he be burbling? must we be burbling? must you be burbling? must they be burbling?
Perfecto
must I have burbled? must you have burbled? must he have burbled? must we have burbled? must you have burbled? must they have burbled?
Perfecto con V-ing
must I have been burbling? must you have been burbling? must he have been burbling? must we have been burbling? must you have been burbling? must they have been burbling?
Forma interro-negativa
Forma simple
must I not burble? must you not burble? must he not burble? must we not burble? must you not burble? must they not burble?
Forma con V-ing
must I not be burbling? must you not be burbling? must he not be burbling? must we not be burbling? must you not be burbling? must they not be burbling?
Perfecto
must I not have burbled? must you not have burbled? must he not have burbled? must we not have burbled? must you not have burbled? must they not have burbled?
Perfecto con V-ing
must I not have been burbling? must you not have been burbling? must he not have been burbling? must we not have been burbling? must you not have been burbling? must they not have been burbling?