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 can't opt you can't opt she can't opt we can't opt you can't opt they can't opt
V-ing form
I can't be opting you can't be opting she can't be opting we can't be opting you can't be opting they can't be opting
Perfect
I can't have opted you can't have opted she can't have opted we can't have opted you can't have opted they can't have opted
V-ing perfect
I can't have been opting you can't have been opting she can't have been opting we can't have been opting you can't have been opting they can't 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't I opt? can't you opt? can't she opt? can't we opt? can't you opt? can't they opt?
V-ing form
can't I be opting? can't you be opting? can't she be opting? can't we be opting? can't you be opting? can't they be opting?
Perfect
can't I have opted? can't you have opted? can't she have opted? can't we have opted? can't you have opted? can't they have opted?
V-ing perfect
can't I have been opting? can't you have been opting? can't she have been opting? can't we have been opting? can't you have been opting? can't they have been opting?