I can opt you can opt she can opt we can opt you can opt they can opt
V-ing form
I can be opting you can be opting she can be opting we can be opting you can be opting they can be opting
Perfect
I can have opted you can have opted she can have opted we can have opted you can have opted they can have opted
V-ing perfect
I can have been opting you can have been opting she can have been opting we can have been opting you can have been opting they can have been opting
Negation
Simple form
I cannot opt you cannot opt she cannot opt we cannot opt you cannot opt they cannot opt
V-ing form
I cannot be opting you cannot be opting she cannot be opting we cannot be opting you cannot be opting they cannot be opting
Perfect
I cannot have opted you cannot have opted she cannot have opted we cannot have opted you cannot have opted they cannot have opted
V-ing perfect
I cannot have been opting you cannot have been opting she cannot have been opting we cannot have been opting you cannot have been opting they cannot have been opting
Interrogative form
Simple form
can I opt? can you opt? can she opt? can we opt? can you opt? can they opt?
V-ing form
can I be opting? can you be opting? can she be opting? can we be opting? can you be opting? can they be opting?
Perfect
can I have opted? can you have opted? can she have opted? can we have opted? can you have opted? can they have opted?
V-ing perfect
can I have been opting? can you have been opting? can she have been opting? can we have been opting? can you have been opting? can they have been opting?
Interro-negative form
Simple form
can I not opt? can you not opt? can she not opt? can we not opt? can you not opt? can they not opt?
V-ing form
can I not be opting? can you not be opting? can she not be opting? can we not be opting? can you not be opting? can they not be opting?
Perfect
can I not have opted? can you not have opted? can she not have opted? can we not have opted? can you not have opted? can they not have opted?
V-ing perfect
can I not have been opting? can you not have been opting? can she not have been opting? can we not have been opting? can you not have been opting? can they not have been opting?