I can caution you can caution he can caution we can caution you can caution they can caution
Forme en 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
Perfect
I can have cautioned you can have cautioned he can have cautioned we can have cautioned you can have cautioned they can have cautioned
Perfect en 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
Négation
Forme 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
Forme en 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
Perfect
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
Perfect en 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
Forme interrogative
Forme simple
can I caution? can you caution? can he caution? can we caution? can you caution? can they caution?
Forme en 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?
Perfect
can I have cautioned? can you have cautioned? can he have cautioned? can we have cautioned? can you have cautioned? can they have cautioned?
Perfect en 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?
Forme interro-négative
Forme 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?
Forme en 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?
Perfect
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?
Perfect en 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?