I could babyproof you could babyproof she could babyproof we could babyproof you could babyproof they could babyproof
V-ing form
I could be babyproofing you could be babyproofing she could be babyproofing we could be babyproofing you could be babyproofing they could be babyproofing
Perfect
I could have babyproofed you could have babyproofed she 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 she could have been babyproofing we could have been babyproofing you could have been babyproofing they could have been babyproofing
Negation
Simple form
I couldn't babyproof you couldn't babyproof she couldn't babyproof we couldn't babyproof you couldn't babyproof they couldn't babyproof
V-ing form
I couldn't be babyproofing you couldn't be babyproofing she couldn't be babyproofing we couldn't be babyproofing you couldn't be babyproofing they couldn't be babyproofing
Perfect
I couldn't have babyproofed you couldn't have babyproofed she couldn't have babyproofed we couldn't have babyproofed you couldn't have babyproofed they couldn't have babyproofed
V-ing perfect
I couldn't have been babyproofing you couldn't have been babyproofing she couldn't have been babyproofing we couldn't have been babyproofing you couldn't have been babyproofing they couldn't have been babyproofing
Interrogative form
Simple form
could I babyproof? could you babyproof? could she babyproof? could we babyproof? could you babyproof? could they babyproof?
V-ing form
could I be babyproofing? could you be babyproofing? could she be babyproofing? could we be babyproofing? could you be babyproofing? could they be babyproofing?
Perfect
could I have babyproofed? could you have babyproofed? could she 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 she have been babyproofing? could we have been babyproofing? could you have been babyproofing? could they have been babyproofing?
Interro-negative form
Simple form
couldn't I babyproof? couldn't you babyproof? couldn't she babyproof? couldn't we babyproof? couldn't you babyproof? couldn't they babyproof?
V-ing form
couldn't I be babyproofing? couldn't you be babyproofing? couldn't she be babyproofing? couldn't we be babyproofing? couldn't you be babyproofing? couldn't they be babyproofing?
Perfect
couldn't I have babyproofed? couldn't you have babyproofed? couldn't she have babyproofed? couldn't we have babyproofed? couldn't you have babyproofed? couldn't they have babyproofed?
V-ing perfect
couldn't I have been babyproofing? couldn't you have been babyproofing? couldn't she have been babyproofing? couldn't we have been babyproofing? couldn't you have been babyproofing? couldn't they have been babyproofing?