I could bulldoze you could bulldoze he could bulldoze we could bulldoze you could bulldoze they could bulldoze
V-ing form
I could be bulldozing you could be bulldozing he could be bulldozing we could be bulldozing you could be bulldozing they could be bulldozing
Perfect
I could have bulldozed you could have bulldozed he could have bulldozed we could have bulldozed you could have bulldozed they could have bulldozed
V-ing perfect
I could have been bulldozing you could have been bulldozing he could have been bulldozing we could have been bulldozing you could have been bulldozing they could have been bulldozing
Negation
Simple form
I could not bulldoze you could not bulldoze he could not bulldoze we could not bulldoze you could not bulldoze they could not bulldoze
V-ing form
I could not be bulldozing you could not be bulldozing he could not be bulldozing we could not be bulldozing you could not be bulldozing they could not be bulldozing
Perfect
I could not have bulldozed you could not have bulldozed he could not have bulldozed we could not have bulldozed you could not have bulldozed they could not have bulldozed
V-ing perfect
I could not have been bulldozing you could not have been bulldozing he could not have been bulldozing we could not have been bulldozing you could not have been bulldozing they could not have been bulldozing
Interrogative form
Simple form
could I bulldoze? could you bulldoze? could he bulldoze? could we bulldoze? could you bulldoze? could they bulldoze?
V-ing form
could I be bulldozing? could you be bulldozing? could he be bulldozing? could we be bulldozing? could you be bulldozing? could they be bulldozing?
Perfect
could I have bulldozed? could you have bulldozed? could he have bulldozed? could we have bulldozed? could you have bulldozed? could they have bulldozed?
V-ing perfect
could I have been bulldozing? could you have been bulldozing? could he have been bulldozing? could we have been bulldozing? could you have been bulldozing? could they have been bulldozing?
Interro-negative form
Simple form
could I not bulldoze? could you not bulldoze? could he not bulldoze? could we not bulldoze? could you not bulldoze? could they not bulldoze?
V-ing form
could I not be bulldozing? could you not be bulldozing? could he not be bulldozing? could we not be bulldozing? could you not be bulldozing? could they not be bulldozing?
Perfect
could I not have bulldozed? could you not have bulldozed? could he not have bulldozed? could we not have bulldozed? could you not have bulldozed? could they not have bulldozed?
V-ing perfect
could I not have been bulldozing? could you not have been bulldozing? could he not have been bulldozing? could we not have been bulldozing? could you not have been bulldozing? could they not have been bulldozing?