I could govern you could govern he could govern we could govern you could govern they could govern
V-ing form
I could be governing you could be governing he could be governing we could be governing you could be governing they could be governing
Perfect
I could have governed you could have governed he could have governed we could have governed you could have governed they could have governed
V-ing perfect
I could have been governing you could have been governing he could have been governing we could have been governing you could have been governing they could have been governing
Negation
Simple form
I could not govern you could not govern he could not govern we could not govern you could not govern they could not govern
V-ing form
I could not be governing you could not be governing he could not be governing we could not be governing you could not be governing they could not be governing
Perfect
I could not have governed you could not have governed he could not have governed we could not have governed you could not have governed they could not have governed
V-ing perfect
I could not have been governing you could not have been governing he could not have been governing we could not have been governing you could not have been governing they could not have been governing
Interrogative form
Simple form
could I govern? could you govern? could he govern? could we govern? could you govern? could they govern?
V-ing form
could I be governing? could you be governing? could he be governing? could we be governing? could you be governing? could they be governing?
Perfect
could I have governed? could you have governed? could he have governed? could we have governed? could you have governed? could they have governed?
V-ing perfect
could I have been governing? could you have been governing? could he have been governing? could we have been governing? could you have been governing? could they have been governing?
Interro-negative form
Simple form
could I not govern? could you not govern? could he not govern? could we not govern? could you not govern? could they not govern?
V-ing form
could I not be governing? could you not be governing? could he not be governing? could we not be governing? could you not be governing? could they not be governing?
Perfect
could I not have governed? could you not have governed? could he not have governed? could we not have governed? could you not have governed? could they not have governed?
V-ing perfect
could I not have been governing? could you not have been governing? could he not have been governing? could we not have been governing? could you not have been governing? could they not have been governing?