I can caution you can caution he can caution we can caution you can caution they can caution
Forma com V-ing
I can be cautioning you can be cautioning he can be cautioning we can be cautioning you can be cautioning they can be cautioning
Perfeito
I can have cautioned you can have cautioned he can have cautioned we can have cautioned you can have cautioned they can have cautioned
Perfeito com V-ing
I can have been cautioning you can have been cautioning he can have been cautioning we can have been cautioning you can have been cautioning they can have been cautioning
Negação
Forma simple
I can't caution you can't caution he can't caution we can't caution you can't caution they can't caution
Forma com V-ing
I can't be cautioning you can't be cautioning he can't be cautioning we can't be cautioning you can't be cautioning they can't be cautioning
Perfeito
I can't have cautioned you can't have cautioned he can't have cautioned we can't have cautioned you can't have cautioned they can't have cautioned
Perfeito com V-ing
I can't have been cautioning you can't have been cautioning he can't have been cautioning we can't have been cautioning you can't have been cautioning they can't have been cautioning
Forma interrogativa
Forma simple
can I caution? can you caution? can he caution? can we caution? can you caution? can they caution?
Forma com V-ing
can I be cautioning? can you be cautioning? can he be cautioning? can we be cautioning? can you be cautioning? can they be cautioning?
Perfeito
can I have cautioned? can you have cautioned? can he have cautioned? can we have cautioned? can you have cautioned? can they have cautioned?
Perfeito com V-ing
can I have been cautioning? can you have been cautioning? can he have been cautioning? can we have been cautioning? can you have been cautioning? can they have been cautioning?
Forma interro-Negação
Forma simple
can't I caution? can't you caution? can't he caution? can't we caution? can't you caution? can't they caution?
Forma com V-ing
can't I be cautioning? can't you be cautioning? can't he be cautioning? can't we be cautioning? can't you be cautioning? can't they be cautioning?
Perfeito
can't I have cautioned? can't you have cautioned? can't he have cautioned? can't we have cautioned? can't you have cautioned? can't they have cautioned?
Perfeito com V-ing
can't I have been cautioning? can't you have been cautioning? can't he have been cautioning? can't we have been cautioning? can't you have been cautioning? can't they have been cautioning?