I could fan you could fan she could fan we could fan you could fan they could fan
V-ing form
I could be fanning you could be fanning she could be fanning we could be fanning you could be fanning they could be fanning
Perfect
I could have fanned you could have fanned she could have fanned we could have fanned you could have fanned they could have fanned
V-ing perfect
I could have been fanning you could have been fanning she could have been fanning we could have been fanning you could have been fanning they could have been fanning
Negation
Simple form
I couldn't fan you couldn't fan she couldn't fan we couldn't fan you couldn't fan they couldn't fan
V-ing form
I couldn't be fanning you couldn't be fanning she couldn't be fanning we couldn't be fanning you couldn't be fanning they couldn't be fanning
Perfect
I couldn't have fanned you couldn't have fanned she couldn't have fanned we couldn't have fanned you couldn't have fanned they couldn't have fanned
V-ing perfect
I couldn't have been fanning you couldn't have been fanning she couldn't have been fanning we couldn't have been fanning you couldn't have been fanning they couldn't have been fanning
Interrogative form
Simple form
could I fan? could you fan? could she fan? could we fan? could you fan? could they fan?
V-ing form
could I be fanning? could you be fanning? could she be fanning? could we be fanning? could you be fanning? could they be fanning?
Perfect
could I have fanned? could you have fanned? could she have fanned? could we have fanned? could you have fanned? could they have fanned?
V-ing perfect
could I have been fanning? could you have been fanning? could she have been fanning? could we have been fanning? could you have been fanning? could they have been fanning?
Interro-negative form
Simple form
couldn't I fan? couldn't you fan? couldn't she fan? couldn't we fan? couldn't you fan? couldn't they fan?
V-ing form
couldn't I be fanning? couldn't you be fanning? couldn't she be fanning? couldn't we be fanning? couldn't you be fanning? couldn't they be fanning?
Perfect
couldn't I have fanned? couldn't you have fanned? couldn't she have fanned? couldn't we have fanned? couldn't you have fanned? couldn't they have fanned?
V-ing perfect
couldn't I have been fanning? couldn't you have been fanning? couldn't she have been fanning? couldn't we have been fanning? couldn't you have been fanning? couldn't they have been fanning?