I could avulse you could avulse he could avulse we could avulse you could avulse they could avulse
V-ing form
I could be avulsing you could be avulsing he could be avulsing we could be avulsing you could be avulsing they could be avulsing
Perfect
I could have avulsed you could have avulsed he could have avulsed we could have avulsed you could have avulsed they could have avulsed
V-ing perfect
I could have been avulsing you could have been avulsing he could have been avulsing we could have been avulsing you could have been avulsing they could have been avulsing
Negation
Simple form
I could not avulse you could not avulse he could not avulse we could not avulse you could not avulse they could not avulse
V-ing form
I could not be avulsing you could not be avulsing he could not be avulsing we could not be avulsing you could not be avulsing they could not be avulsing
Perfect
I could not have avulsed you could not have avulsed he could not have avulsed we could not have avulsed you could not have avulsed they could not have avulsed
V-ing perfect
I could not have been avulsing you could not have been avulsing he could not have been avulsing we could not have been avulsing you could not have been avulsing they could not have been avulsing
Interrogative form
Simple form
could I avulse? could you avulse? could he avulse? could we avulse? could you avulse? could they avulse?
V-ing form
could I be avulsing? could you be avulsing? could he be avulsing? could we be avulsing? could you be avulsing? could they be avulsing?
Perfect
could I have avulsed? could you have avulsed? could he have avulsed? could we have avulsed? could you have avulsed? could they have avulsed?
V-ing perfect
could I have been avulsing? could you have been avulsing? could he have been avulsing? could we have been avulsing? could you have been avulsing? could they have been avulsing?
Interro-negative form
Simple form
could I not avulse? could you not avulse? could he not avulse? could we not avulse? could you not avulse? could they not avulse?
V-ing form
could I not be avulsing? could you not be avulsing? could he not be avulsing? could we not be avulsing? could you not be avulsing? could they not be avulsing?
Perfect
could I not have avulsed? could you not have avulsed? could he not have avulsed? could we not have avulsed? could you not have avulsed? could they not have avulsed?
V-ing perfect
could I not have been avulsing? could you not have been avulsing? could he not have been avulsing? could we not have been avulsing? could you not have been avulsing? could they not have been avulsing?