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