I could hurrah you could hurrah he could hurrah we could hurrah you could hurrah they could hurrah
V-ing form
I could be hurrahing you could be hurrahing he could be hurrahing we could be hurrahing you could be hurrahing they could be hurrahing
Perfect
I could have hurrahed you could have hurrahed he could have hurrahed we could have hurrahed you could have hurrahed they could have hurrahed
V-ing perfect
I could have been hurrahing you could have been hurrahing he could have been hurrahing we could have been hurrahing you could have been hurrahing they could have been hurrahing
Negation
Simple form
I couldn't hurrah you couldn't hurrah he couldn't hurrah we couldn't hurrah you couldn't hurrah they couldn't hurrah
V-ing form
I couldn't be hurrahing you couldn't be hurrahing he couldn't be hurrahing we couldn't be hurrahing you couldn't be hurrahing they couldn't be hurrahing
Perfect
I couldn't have hurrahed you couldn't have hurrahed he couldn't have hurrahed we couldn't have hurrahed you couldn't have hurrahed they couldn't have hurrahed
V-ing perfect
I couldn't have been hurrahing you couldn't have been hurrahing he couldn't have been hurrahing we couldn't have been hurrahing you couldn't have been hurrahing they couldn't have been hurrahing
Interrogative form
Simple form
could I hurrah? could you hurrah? could he hurrah? could we hurrah? could you hurrah? could they hurrah?
V-ing form
could I be hurrahing? could you be hurrahing? could he be hurrahing? could we be hurrahing? could you be hurrahing? could they be hurrahing?
Perfect
could I have hurrahed? could you have hurrahed? could he have hurrahed? could we have hurrahed? could you have hurrahed? could they have hurrahed?
V-ing perfect
could I have been hurrahing? could you have been hurrahing? could he have been hurrahing? could we have been hurrahing? could you have been hurrahing? could they have been hurrahing?
Interro-negative form
Simple form
couldn't I hurrah? couldn't you hurrah? couldn't he hurrah? couldn't we hurrah? couldn't you hurrah? couldn't they hurrah?
V-ing form
couldn't I be hurrahing? couldn't you be hurrahing? couldn't he be hurrahing? couldn't we be hurrahing? couldn't you be hurrahing? couldn't they be hurrahing?
Perfect
couldn't I have hurrahed? couldn't you have hurrahed? couldn't he have hurrahed? couldn't we have hurrahed? couldn't you have hurrahed? couldn't they have hurrahed?
V-ing perfect
couldn't I have been hurrahing? couldn't you have been hurrahing? couldn't he have been hurrahing? couldn't we have been hurrahing? couldn't you have been hurrahing? couldn't they have been hurrahing?