I can untie you can untie he can untie we can untie you can untie they can untie
Forma com V-ing
I can be untying you can be untying he can be untying we can be untying you can be untying they can be untying
Perfeito
I can have untied you can have untied he can have untied we can have untied you can have untied they can have untied
Perfeito com V-ing
I can have been untying you can have been untying he can have been untying we can have been untying you can have been untying they can have been untying
Negação
Forma simple
I cannot untie you cannot untie he cannot untie we cannot untie you cannot untie they cannot untie
Forma com V-ing
I cannot be untying you cannot be untying he cannot be untying we cannot be untying you cannot be untying they cannot be untying
Perfeito
I cannot have untied you cannot have untied he cannot have untied we cannot have untied you cannot have untied they cannot have untied
Perfeito com V-ing
I cannot have been untying you cannot have been untying he cannot have been untying we cannot have been untying you cannot have been untying they cannot have been untying
Forma interrogativa
Forma simple
can I untie? can you untie? can he untie? can we untie? can you untie? can they untie?
Forma com V-ing
can I be untying? can you be untying? can he be untying? can we be untying? can you be untying? can they be untying?
Perfeito
can I have untied? can you have untied? can he have untied? can we have untied? can you have untied? can they have untied?
Perfeito com V-ing
can I have been untying? can you have been untying? can he have been untying? can we have been untying? can you have been untying? can they have been untying?
Forma interro-Negação
Forma simple
can I not untie? can you not untie? can he not untie? can we not untie? can you not untie? can they not untie?
Forma com V-ing
can I not be untying? can you not be untying? can he not be untying? can we not be untying? can you not be untying? can they not be untying?
Perfeito
can I not have untied? can you not have untied? can he not have untied? can we not have untied? can you not have untied? can they not have untied?
Perfeito com V-ing
can I not have been untying? can you not have been untying? can he not have been untying? can we not have been untying? can you not have been untying? can they not have been untying?