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