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