I can adopt you can adopt she can adopt we can adopt you can adopt they can adopt
V-ing form
I can be adopting you can be adopting she can be adopting we can be adopting you can be adopting they can be adopting
Perfect
I can have adopted you can have adopted she can have adopted we can have adopted you can have adopted they can have adopted
V-ing perfect
I can have been adopting you can have been adopting she can have been adopting we can have been adopting you can have been adopting they can have been adopting
Negation
Simple form
I cannot adopt you cannot adopt she cannot adopt we cannot adopt you cannot adopt they cannot adopt
V-ing form
I cannot be adopting you cannot be adopting she cannot be adopting we cannot be adopting you cannot be adopting they cannot be adopting
Perfect
I cannot have adopted you cannot have adopted she cannot have adopted we cannot have adopted you cannot have adopted they cannot have adopted
V-ing perfect
I cannot have been adopting you cannot have been adopting she cannot have been adopting we cannot have been adopting you cannot have been adopting they cannot have been adopting
Interrogative form
Simple form
can I adopt? can you adopt? can she adopt? can we adopt? can you adopt? can they adopt?
V-ing form
can I be adopting? can you be adopting? can she be adopting? can we be adopting? can you be adopting? can they be adopting?
Perfect
can I have adopted? can you have adopted? can she have adopted? can we have adopted? can you have adopted? can they have adopted?
V-ing perfect
can I have been adopting? can you have been adopting? can she have been adopting? can we have been adopting? can you have been adopting? can they have been adopting?
Interro-negative form
Simple form
can I not adopt? can you not adopt? can she not adopt? can we not adopt? can you not adopt? can they not adopt?
V-ing form
can I not be adopting? can you not be adopting? can she not be adopting? can we not be adopting? can you not be adopting? can they not be adopting?
Perfect
can I not have adopted? can you not have adopted? can she not have adopted? can we not have adopted? can you not have adopted? can they not have adopted?
V-ing perfect
can I not have been adopting? can you not have been adopting? can she not have been adopting? can we not have been adopting? can you not have been adopting? can they not have been adopting?