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 cannot prevalue you cannot prevalue he cannot prevalue we cannot prevalue you cannot prevalue they cannot prevalue
V-ing form
I cannot be prevaluing you cannot be prevaluing he cannot be prevaluing we cannot be prevaluing you cannot be prevaluing they cannot be prevaluing
Perfect
I cannot have prevalued you cannot have prevalued he cannot have prevalued we cannot have prevalued you cannot have prevalued they cannot have prevalued
V-ing perfect
I cannot have been prevaluing you cannot have been prevaluing he cannot have been prevaluing we cannot have been prevaluing you cannot have been prevaluing they cannot 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 I not prevalue? can you not prevalue? can he not prevalue? can we not prevalue? can you not prevalue? can they not prevalue?
V-ing form
can I not be prevaluing? can you not be prevaluing? can he not be prevaluing? can we not be prevaluing? can you not be prevaluing? can they not be prevaluing?
Perfect
can I not have prevalued? can you not have prevalued? can he not have prevalued? can we not have prevalued? can you not have prevalued? can they not have prevalued?
V-ing perfect
can I not have been prevaluing? can you not have been prevaluing? can he not have been prevaluing? can we not have been prevaluing? can you not have been prevaluing? can they not have been prevaluing?