English verb conjugation
COULD WEATHERPROOF

Regular verb: weatherproof - weatherproofed - weatherproofed

Affirmation

Simple form	V-ing form
I could weatherproof you could weatherproof he could weatherproof we could weatherproof you could weatherproof they could weatherproof	I could be weatherproofing you could be weatherproofing he could be weatherproofing we could be weatherproofing you could be weatherproofing they could be weatherproofing
Perfect	V-ing perfect
I could have weatherproofed you could have weatherproofed he could have weatherproofed we could have weatherproofed you could have weatherproofed they could have weatherproofed	I could have been weatherproofing you could have been weatherproofing he could have been weatherproofing we could have been weatherproofing you could have been weatherproofing they could have been weatherproofing

Negation

Simple form	V-ing form
I couldn't weatherproof you couldn't weatherproof he couldn't weatherproof we couldn't weatherproof you couldn't weatherproof they couldn't weatherproof	I couldn't be weatherproofing you couldn't be weatherproofing he couldn't be weatherproofing we couldn't be weatherproofing you couldn't be weatherproofing they couldn't be weatherproofing
Perfect	V-ing perfect
I couldn't have weatherproofed you couldn't have weatherproofed he couldn't have weatherproofed we couldn't have weatherproofed you couldn't have weatherproofed they couldn't have weatherproofed	I couldn't have been weatherproofing you couldn't have been weatherproofing he couldn't have been weatherproofing we couldn't have been weatherproofing you couldn't have been weatherproofing they couldn't have been weatherproofing

Interrogative form

Simple form	V-ing form
could I weatherproof? could you weatherproof? could he weatherproof? could we weatherproof? could you weatherproof? could they weatherproof?	could I be weatherproofing? could you be weatherproofing? could he be weatherproofing? could we be weatherproofing? could you be weatherproofing? could they be weatherproofing?
Perfect	V-ing perfect
could I have weatherproofed? could you have weatherproofed? could he have weatherproofed? could we have weatherproofed? could you have weatherproofed? could they have weatherproofed?	could I have been weatherproofing? could you have been weatherproofing? could he have been weatherproofing? could we have been weatherproofing? could you have been weatherproofing? could they have been weatherproofing?

Interro-negative form

Simple form	V-ing form
couldn't I weatherproof? couldn't you weatherproof? couldn't he weatherproof? couldn't we weatherproof? couldn't you weatherproof? couldn't they weatherproof?	couldn't I be weatherproofing? couldn't you be weatherproofing? couldn't he be weatherproofing? couldn't we be weatherproofing? couldn't you be weatherproofing? couldn't they be weatherproofing?
Perfect	V-ing perfect
couldn't I have weatherproofed? couldn't you have weatherproofed? couldn't he have weatherproofed? couldn't we have weatherproofed? couldn't you have weatherproofed? couldn't they have weatherproofed?	couldn't I have been weatherproofing? couldn't you have been weatherproofing? couldn't he have been weatherproofing? couldn't we have been weatherproofing? couldn't you have been weatherproofing? couldn't they have been weatherproofing?