I can stifle you can stifle he can stifle we can stifle you can stifle they can stifle
Forma com V-ing
I can be stifling you can be stifling he can be stifling we can be stifling you can be stifling they can be stifling
Perfeito
I can have stifled you can have stifled he can have stifled we can have stifled you can have stifled they can have stifled
Perfeito com V-ing
I can have been stifling you can have been stifling he can have been stifling we can have been stifling you can have been stifling they can have been stifling
Negação
Forma simple
I can't stifle you can't stifle he can't stifle we can't stifle you can't stifle they can't stifle
Forma com V-ing
I can't be stifling you can't be stifling he can't be stifling we can't be stifling you can't be stifling they can't be stifling
Perfeito
I can't have stifled you can't have stifled he can't have stifled we can't have stifled you can't have stifled they can't have stifled
Perfeito com V-ing
I can't have been stifling you can't have been stifling he can't have been stifling we can't have been stifling you can't have been stifling they can't have been stifling
Forma interrogativa
Forma simple
can I stifle? can you stifle? can he stifle? can we stifle? can you stifle? can they stifle?
Forma com V-ing
can I be stifling? can you be stifling? can he be stifling? can we be stifling? can you be stifling? can they be stifling?
Perfeito
can I have stifled? can you have stifled? can he have stifled? can we have stifled? can you have stifled? can they have stifled?
Perfeito com V-ing
can I have been stifling? can you have been stifling? can he have been stifling? can we have been stifling? can you have been stifling? can they have been stifling?
Forma interro-Negação
Forma simple
can't I stifle? can't you stifle? can't he stifle? can't we stifle? can't you stifle? can't they stifle?
Forma com V-ing
can't I be stifling? can't you be stifling? can't he be stifling? can't we be stifling? can't you be stifling? can't they be stifling?
Perfeito
can't I have stifled? can't you have stifled? can't he have stifled? can't we have stifled? can't you have stifled? can't they have stifled?
Perfeito com V-ing
can't I have been stifling? can't you have been stifling? can't he have been stifling? can't we have been stifling? can't you have been stifling? can't they have been stifling?