I must perceive you must perceive he must perceive we must perceive you must perceive they must perceive
Forma com V-ing
I must be perceiving you must be perceiving he must be perceiving we must be perceiving you must be perceiving they must be perceiving
Perfeito
I must have perceived you must have perceived he must have perceived we must have perceived you must have perceived they must have perceived
Perfeito com V-ing
I must have been perceiving you must have been perceiving he must have been perceiving we must have been perceiving you must have been perceiving they must have been perceiving
Negação
Forma simple
I mustn't perceive you mustn't perceive he mustn't perceive we mustn't perceive you mustn't perceive they mustn't perceive
Forma com V-ing
I mustn't be perceiving you mustn't be perceiving he mustn't be perceiving we mustn't be perceiving you mustn't be perceiving they mustn't be perceiving
Perfeito
I mustn't have perceived you mustn't have perceived he mustn't have perceived we mustn't have perceived you mustn't have perceived they mustn't have perceived
Perfeito com V-ing
I mustn't have been perceiving you mustn't have been perceiving he mustn't have been perceiving we mustn't have been perceiving you mustn't have been perceiving they mustn't have been perceiving
Forma interrogativa
Forma simple
must I perceive? must you perceive? must he perceive? must we perceive? must you perceive? must they perceive?
Forma com V-ing
must I be perceiving? must you be perceiving? must he be perceiving? must we be perceiving? must you be perceiving? must they be perceiving?
Perfeito
must I have perceived? must you have perceived? must he have perceived? must we have perceived? must you have perceived? must they have perceived?
Perfeito com V-ing
must I have been perceiving? must you have been perceiving? must he have been perceiving? must we have been perceiving? must you have been perceiving? must they have been perceiving?
Forma interro-Negação
Forma simple
mustn't I perceive? mustn't you perceive? mustn't he perceive? mustn't we perceive? mustn't you perceive? mustn't they perceive?
Forma com V-ing
mustn't I be perceiving? mustn't you be perceiving? mustn't he be perceiving? mustn't we be perceiving? mustn't you be perceiving? mustn't they be perceiving?
Perfeito
mustn't I have perceived? mustn't you have perceived? mustn't he have perceived? mustn't we have perceived? mustn't you have perceived? mustn't they have perceived?
Perfeito com V-ing
mustn't I have been perceiving? mustn't you have been perceiving? mustn't he have been perceiving? mustn't we have been perceiving? mustn't you have been perceiving? mustn't they have been perceiving?