I could grandstand you could grandstand she could grandstand we could grandstand you could grandstand they could grandstand
V-ing form
I could be grandstanding you could be grandstanding she could be grandstanding we could be grandstanding you could be grandstanding they could be grandstanding
Perfect
I could have grandstanded you could have grandstanded she could have grandstanded we could have grandstanded you could have grandstanded they could have grandstanded
V-ing perfect
I could have been grandstanding you could have been grandstanding she could have been grandstanding we could have been grandstanding you could have been grandstanding they could have been grandstanding
Negation
Simple form
I couldn't grandstand you couldn't grandstand she couldn't grandstand we couldn't grandstand you couldn't grandstand they couldn't grandstand
V-ing form
I couldn't be grandstanding you couldn't be grandstanding she couldn't be grandstanding we couldn't be grandstanding you couldn't be grandstanding they couldn't be grandstanding
Perfect
I couldn't have grandstanded you couldn't have grandstanded she couldn't have grandstanded we couldn't have grandstanded you couldn't have grandstanded they couldn't have grandstanded
V-ing perfect
I couldn't have been grandstanding you couldn't have been grandstanding she couldn't have been grandstanding we couldn't have been grandstanding you couldn't have been grandstanding they couldn't have been grandstanding
Interrogative form
Simple form
could I grandstand? could you grandstand? could she grandstand? could we grandstand? could you grandstand? could they grandstand?
V-ing form
could I be grandstanding? could you be grandstanding? could she be grandstanding? could we be grandstanding? could you be grandstanding? could they be grandstanding?
Perfect
could I have grandstanded? could you have grandstanded? could she have grandstanded? could we have grandstanded? could you have grandstanded? could they have grandstanded?
V-ing perfect
could I have been grandstanding? could you have been grandstanding? could she have been grandstanding? could we have been grandstanding? could you have been grandstanding? could they have been grandstanding?
Interro-negative form
Simple form
couldn't I grandstand? couldn't you grandstand? couldn't she grandstand? couldn't we grandstand? couldn't you grandstand? couldn't they grandstand?
V-ing form
couldn't I be grandstanding? couldn't you be grandstanding? couldn't she be grandstanding? couldn't we be grandstanding? couldn't you be grandstanding? couldn't they be grandstanding?
Perfect
couldn't I have grandstanded? couldn't you have grandstanded? couldn't she have grandstanded? couldn't we have grandstanded? couldn't you have grandstanded? couldn't they have grandstanded?
V-ing perfect
couldn't I have been grandstanding? couldn't you have been grandstanding? couldn't she have been grandstanding? couldn't we have been grandstanding? couldn't you have been grandstanding? couldn't they have been grandstanding?