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