I can prevalue you can prevalue he can prevalue we can prevalue you can prevalue they can prevalue
V-ing form
I can be prevaluing you can be prevaluing he can be prevaluing we can be prevaluing you can be prevaluing they can be prevaluing
Perfect
I can have prevalued you can have prevalued he can have prevalued we can have prevalued you can have prevalued they can have prevalued
V-ing perfect
I can have been prevaluing you can have been prevaluing he can have been prevaluing we can have been prevaluing you can have been prevaluing they can have been prevaluing
Negation
Simple form
I can't prevalue you can't prevalue he can't prevalue we can't prevalue you can't prevalue they can't prevalue
V-ing form
I can't be prevaluing you can't be prevaluing he can't be prevaluing we can't be prevaluing you can't be prevaluing they can't be prevaluing
Perfect
I can't have prevalued you can't have prevalued he can't have prevalued we can't have prevalued you can't have prevalued they can't have prevalued
V-ing perfect
I can't have been prevaluing you can't have been prevaluing he can't have been prevaluing we can't have been prevaluing you can't have been prevaluing they can't have been prevaluing
Interrogative form
Simple form
can I prevalue? can you prevalue? can he prevalue? can we prevalue? can you prevalue? can they prevalue?
V-ing form
can I be prevaluing? can you be prevaluing? can he be prevaluing? can we be prevaluing? can you be prevaluing? can they be prevaluing?
Perfect
can I have prevalued? can you have prevalued? can he have prevalued? can we have prevalued? can you have prevalued? can they have prevalued?
V-ing perfect
can I have been prevaluing? can you have been prevaluing? can he have been prevaluing? can we have been prevaluing? can you have been prevaluing? can they have been prevaluing?
Interro-negative form
Simple form
can't I prevalue? can't you prevalue? can't he prevalue? can't we prevalue? can't you prevalue? can't they prevalue?
V-ing form
can't I be prevaluing? can't you be prevaluing? can't he be prevaluing? can't we be prevaluing? can't you be prevaluing? can't they be prevaluing?
Perfect
can't I have prevalued? can't you have prevalued? can't he have prevalued? can't we have prevalued? can't you have prevalued? can't they have prevalued?
V-ing perfect
can't I have been prevaluing? can't you have been prevaluing? can't he have been prevaluing? can't we have been prevaluing? can't you have been prevaluing? can't they have been prevaluing?