I can devolve you can devolve she can devolve we can devolve you can devolve they can devolve
V-ing form
I can be devolving you can be devolving she can be devolving we can be devolving you can be devolving they can be devolving
Perfect
I can have devolved you can have devolved she can have devolved we can have devolved you can have devolved they can have devolved
V-ing perfect
I can have been devolving you can have been devolving she can have been devolving we can have been devolving you can have been devolving they can have been devolving
Negation
Simple form
I cannot devolve you cannot devolve she cannot devolve we cannot devolve you cannot devolve they cannot devolve
V-ing form
I cannot be devolving you cannot be devolving she cannot be devolving we cannot be devolving you cannot be devolving they cannot be devolving
Perfect
I cannot have devolved you cannot have devolved she cannot have devolved we cannot have devolved you cannot have devolved they cannot have devolved
V-ing perfect
I cannot have been devolving you cannot have been devolving she cannot have been devolving we cannot have been devolving you cannot have been devolving they cannot have been devolving
Interrogative form
Simple form
can I devolve? can you devolve? can she devolve? can we devolve? can you devolve? can they devolve?
V-ing form
can I be devolving? can you be devolving? can she be devolving? can we be devolving? can you be devolving? can they be devolving?
Perfect
can I have devolved? can you have devolved? can she have devolved? can we have devolved? can you have devolved? can they have devolved?
V-ing perfect
can I have been devolving? can you have been devolving? can she have been devolving? can we have been devolving? can you have been devolving? can they have been devolving?
Interro-negative form
Simple form
can I not devolve? can you not devolve? can she not devolve? can we not devolve? can you not devolve? can they not devolve?
V-ing form
can I not be devolving? can you not be devolving? can she not be devolving? can we not be devolving? can you not be devolving? can they not be devolving?
Perfect
can I not have devolved? can you not have devolved? can she not have devolved? can we not have devolved? can you not have devolved? can they not have devolved?
V-ing perfect
can I not have been devolving? can you not have been devolving? can she not have been devolving? can we not have been devolving? can you not have been devolving? can they not have been devolving?