I could govern you could govern she could govern we could govern you could govern they could govern
V-ing form
I could be governing you could be governing she could be governing we could be governing you could be governing they could be governing
Perfect
I could have governed you could have governed she 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 she 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 she 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 she 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 she 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 she 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 she govern? could we govern? could you govern? could they govern?
V-ing form
could I be governing? could you be governing? could she be governing? could we be governing? could you be governing? could they be governing?
Perfect
could I have governed? could you have governed? could she 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 she 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 she 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 she 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 she 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 she not have been governing? could we not have been governing? could you not have been governing? could they not have been governing?