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