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 can't devalue you can't devalue she can't devalue we can't devalue you can't devalue they can't devalue
V-ing form
I can't be devaluing you can't be devaluing she can't be devaluing we can't be devaluing you can't be devaluing they can't be devaluing
Perfect
I can't have devalued you can't have devalued she can't have devalued we can't have devalued you can't have devalued they can't have devalued
V-ing perfect
I can't have been devaluing you can't have been devaluing she can't have been devaluing we can't have been devaluing you can't have been devaluing they can't 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't I devalue? can't you devalue? can't she devalue? can't we devalue? can't you devalue? can't they devalue?
V-ing form
can't I be devaluing? can't you be devaluing? can't she be devaluing? can't we be devaluing? can't you be devaluing? can't they be devaluing?
Perfect
can't I have devalued? can't you have devalued? can't she have devalued? can't we have devalued? can't you have devalued? can't they have devalued?
V-ing perfect
can't I have been devaluing? can't you have been devaluing? can't she have been devaluing? can't we have been devaluing? can't you have been devaluing? can't they have been devaluing?