I could bomb you could bomb she could bomb we could bomb you could bomb they could bomb
V-ing form
I could be bombing you could be bombing she could be bombing we could be bombing you could be bombing they could be bombing
Perfect
I could have bombed you could have bombed she 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 she 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 she 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 she 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 she 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 she 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 she bomb? could we bomb? could you bomb? could they bomb?
V-ing form
could I be bombing? could you be bombing? could she be bombing? could we be bombing? could you be bombing? could they be bombing?
Perfect
could I have bombed? could you have bombed? could she 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 she 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 she 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 she 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 she 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 she have been bombing? couldn't we have been bombing? couldn't you have been bombing? couldn't they have been bombing?