I can devalue you can devalue she can devalue we can devalue you can devalue they can devalue
V-ing form
I can be devaluing you can be devaluing she can be devaluing we can be devaluing you can be devaluing they can be devaluing
Perfect
I can have devalued you can have devalued she can have devalued we can have devalued you can have devalued they can have devalued
V-ing perfect
I can have been devaluing you can have been devaluing she can have been devaluing we can have been devaluing you can have been devaluing they can have been devaluing
Negation
Simple form
I cannot devalue you cannot devalue she cannot devalue we cannot devalue you cannot devalue they cannot devalue
V-ing form
I cannot be devaluing you cannot be devaluing she cannot be devaluing we cannot be devaluing you cannot be devaluing they cannot be devaluing
Perfect
I cannot have devalued you cannot have devalued she cannot have devalued we cannot have devalued you cannot have devalued they cannot have devalued
V-ing perfect
I cannot have been devaluing you cannot have been devaluing she cannot have been devaluing we cannot have been devaluing you cannot have been devaluing they cannot have been devaluing
Interrogative form
Simple form
can I devalue? can you devalue? can she devalue? can we devalue? can you devalue? can they devalue?
V-ing form
can I be devaluing? can you be devaluing? can she be devaluing? can we be devaluing? can you be devaluing? can they be devaluing?
Perfect
can I have devalued? can you have devalued? can she have devalued? can we have devalued? can you have devalued? can they have devalued?
V-ing perfect
can I have been devaluing? can you have been devaluing? can she have been devaluing? can we have been devaluing? can you have been devaluing? can they have been devaluing?
Interro-negative form
Simple form
can I not devalue? can you not devalue? can she not devalue? can we not devalue? can you not devalue? can they not devalue?
V-ing form
can I not be devaluing? can you not be devaluing? can she not be devaluing? can we not be devaluing? can you not be devaluing? can they not be devaluing?
Perfect
can I not have devalued? can you not have devalued? can she not have devalued? can we not have devalued? can you not have devalued? can they not have devalued?
V-ing perfect
can I not have been devaluing? can you not have been devaluing? can she not have been devaluing? can we not have been devaluing? can you not have been devaluing? can they not have been devaluing?