I can fast-forward you can fast-forward she can fast-forward we can fast-forward you can fast-forward they can fast-forward
V-ing form
I can be fast-forwarding you can be fast-forwarding she can be fast-forwarding we can be fast-forwarding you can be fast-forwarding they can be fast-forwarding
Perfect
I can have fast-forwarded you can have fast-forwarded she can have fast-forwarded we can have fast-forwarded you can have fast-forwarded they can have fast-forwarded
V-ing perfect
I can have been fast-forwarding you can have been fast-forwarding she can have been fast-forwarding we can have been fast-forwarding you can have been fast-forwarding they can have been fast-forwarding
Negation
Simple form
I can't fast-forward you can't fast-forward she can't fast-forward we can't fast-forward you can't fast-forward they can't fast-forward
V-ing form
I can't be fast-forwarding you can't be fast-forwarding she can't be fast-forwarding we can't be fast-forwarding you can't be fast-forwarding they can't be fast-forwarding
Perfect
I can't have fast-forwarded you can't have fast-forwarded she can't have fast-forwarded we can't have fast-forwarded you can't have fast-forwarded they can't have fast-forwarded
V-ing perfect
I can't have been fast-forwarding you can't have been fast-forwarding she can't have been fast-forwarding we can't have been fast-forwarding you can't have been fast-forwarding they can't have been fast-forwarding
Interrogative form
Simple form
can I fast-forward? can you fast-forward? can she fast-forward? can we fast-forward? can you fast-forward? can they fast-forward?
V-ing form
can I be fast-forwarding? can you be fast-forwarding? can she be fast-forwarding? can we be fast-forwarding? can you be fast-forwarding? can they be fast-forwarding?
Perfect
can I have fast-forwarded? can you have fast-forwarded? can she have fast-forwarded? can we have fast-forwarded? can you have fast-forwarded? can they have fast-forwarded?
V-ing perfect
can I have been fast-forwarding? can you have been fast-forwarding? can she have been fast-forwarding? can we have been fast-forwarding? can you have been fast-forwarding? can they have been fast-forwarding?
Interro-negative form
Simple form
can't I fast-forward? can't you fast-forward? can't she fast-forward? can't we fast-forward? can't you fast-forward? can't they fast-forward?
V-ing form
can't I be fast-forwarding? can't you be fast-forwarding? can't she be fast-forwarding? can't we be fast-forwarding? can't you be fast-forwarding? can't they be fast-forwarding?
Perfect
can't I have fast-forwarded? can't you have fast-forwarded? can't she have fast-forwarded? can't we have fast-forwarded? can't you have fast-forwarded? can't they have fast-forwarded?
V-ing perfect
can't I have been fast-forwarding? can't you have been fast-forwarding? can't she have been fast-forwarding? can't we have been fast-forwarding? can't you have been fast-forwarding? can't they have been fast-forwarding?