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