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