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