I could babyproof you could babyproof he could babyproof we could babyproof you could babyproof they could babyproof
V-ing form
I could be babyproofing you could be babyproofing he could be babyproofing we could be babyproofing you could be babyproofing they could be babyproofing
Perfect
I could have babyproofed you could have babyproofed he could have babyproofed we could have babyproofed you could have babyproofed they could have babyproofed
V-ing perfect
I could have been babyproofing you could have been babyproofing he could have been babyproofing we could have been babyproofing you could have been babyproofing they could have been babyproofing
Negation
Simple form
I could not babyproof you could not babyproof he could not babyproof we could not babyproof you could not babyproof they could not babyproof
V-ing form
I could not be babyproofing you could not be babyproofing he could not be babyproofing we could not be babyproofing you could not be babyproofing they could not be babyproofing
Perfect
I could not have babyproofed you could not have babyproofed he could not have babyproofed we could not have babyproofed you could not have babyproofed they could not have babyproofed
V-ing perfect
I could not have been babyproofing you could not have been babyproofing he could not have been babyproofing we could not have been babyproofing you could not have been babyproofing they could not have been babyproofing
Interrogative form
Simple form
could I babyproof? could you babyproof? could he babyproof? could we babyproof? could you babyproof? could they babyproof?
V-ing form
could I be babyproofing? could you be babyproofing? could he be babyproofing? could we be babyproofing? could you be babyproofing? could they be babyproofing?
Perfect
could I have babyproofed? could you have babyproofed? could he have babyproofed? could we have babyproofed? could you have babyproofed? could they have babyproofed?
V-ing perfect
could I have been babyproofing? could you have been babyproofing? could he have been babyproofing? could we have been babyproofing? could you have been babyproofing? could they have been babyproofing?
Interro-negative form
Simple form
could I not babyproof? could you not babyproof? could he not babyproof? could we not babyproof? could you not babyproof? could they not babyproof?
V-ing form
could I not be babyproofing? could you not be babyproofing? could he not be babyproofing? could we not be babyproofing? could you not be babyproofing? could they not be babyproofing?
Perfect
could I not have babyproofed? could you not have babyproofed? could he not have babyproofed? could we not have babyproofed? could you not have babyproofed? could they not have babyproofed?
V-ing perfect
could I not have been babyproofing? could you not have been babyproofing? could he not have been babyproofing? could we not have been babyproofing? could you not have been babyproofing? could they not have been babyproofing?