English verb conjugation
COULD QUAKEPROOF

Regular verb: quakeproof - quakeproofed - quakeproofed

Affirmation

Simple form	V-ing form
I could quakeproof you could quakeproof she could quakeproof we could quakeproof you could quakeproof they could quakeproof	I could be quakeproofing you could be quakeproofing she could be quakeproofing we could be quakeproofing you could be quakeproofing they could be quakeproofing
Perfect	V-ing perfect
I could have quakeproofed you could have quakeproofed she could have quakeproofed we could have quakeproofed you could have quakeproofed they could have quakeproofed	I could have been quakeproofing you could have been quakeproofing she could have been quakeproofing we could have been quakeproofing you could have been quakeproofing they could have been quakeproofing

Negation

Simple form	V-ing form
I couldn't quakeproof you couldn't quakeproof she couldn't quakeproof we couldn't quakeproof you couldn't quakeproof they couldn't quakeproof	I couldn't be quakeproofing you couldn't be quakeproofing she couldn't be quakeproofing we couldn't be quakeproofing you couldn't be quakeproofing they couldn't be quakeproofing
Perfect	V-ing perfect
I couldn't have quakeproofed you couldn't have quakeproofed she couldn't have quakeproofed we couldn't have quakeproofed you couldn't have quakeproofed they couldn't have quakeproofed	I couldn't have been quakeproofing you couldn't have been quakeproofing she couldn't have been quakeproofing we couldn't have been quakeproofing you couldn't have been quakeproofing they couldn't have been quakeproofing

Interrogative form

Simple form	V-ing form
could I quakeproof? could you quakeproof? could she quakeproof? could we quakeproof? could you quakeproof? could they quakeproof?	could I be quakeproofing? could you be quakeproofing? could she be quakeproofing? could we be quakeproofing? could you be quakeproofing? could they be quakeproofing?
Perfect	V-ing perfect
could I have quakeproofed? could you have quakeproofed? could she have quakeproofed? could we have quakeproofed? could you have quakeproofed? could they have quakeproofed?	could I have been quakeproofing? could you have been quakeproofing? could she have been quakeproofing? could we have been quakeproofing? could you have been quakeproofing? could they have been quakeproofing?

Interro-negative form

Simple form	V-ing form
couldn't I quakeproof? couldn't you quakeproof? couldn't she quakeproof? couldn't we quakeproof? couldn't you quakeproof? couldn't they quakeproof?	couldn't I be quakeproofing? couldn't you be quakeproofing? couldn't she be quakeproofing? couldn't we be quakeproofing? couldn't you be quakeproofing? couldn't they be quakeproofing?
Perfect	V-ing perfect
couldn't I have quakeproofed? couldn't you have quakeproofed? couldn't she have quakeproofed? couldn't we have quakeproofed? couldn't you have quakeproofed? couldn't they have quakeproofed?	couldn't I have been quakeproofing? couldn't you have been quakeproofing? couldn't she have been quakeproofing? couldn't we have been quakeproofing? couldn't you have been quakeproofing? couldn't they have been quakeproofing?