I could weatherproof you could weatherproof he could weatherproof we could weatherproof you could weatherproof they could weatherproof
V-ing form
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
I could have weatherproofed you could have weatherproofed he could have weatherproofed we could have weatherproofed you could have weatherproofed they could have weatherproofed
V-ing perfect
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
I could not weatherproof you could not weatherproof he could not weatherproof we could not weatherproof you could not weatherproof they could not weatherproof
V-ing form
I could not be weatherproofing you could not be weatherproofing he could not be weatherproofing we could not be weatherproofing you could not be weatherproofing they could not be weatherproofing
Perfect
I could not have weatherproofed you could not have weatherproofed he could not have weatherproofed we could not have weatherproofed you could not have weatherproofed they could not have weatherproofed
V-ing perfect
I could not have been weatherproofing you could not have been weatherproofing he could not have been weatherproofing we could not have been weatherproofing you could not have been weatherproofing they could not have been weatherproofing
Interrogative form
Simple form
could I weatherproof? could you weatherproof? could he weatherproof? could we weatherproof? could you weatherproof? could they weatherproof?
V-ing form
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
could I have weatherproofed? could you have weatherproofed? could he have weatherproofed? could we have weatherproofed? could you have weatherproofed? could they have weatherproofed?
V-ing perfect
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
could I not weatherproof? could you not weatherproof? could he not weatherproof? could we not weatherproof? could you not weatherproof? could they not weatherproof?
V-ing form
could I not be weatherproofing? could you not be weatherproofing? could he not be weatherproofing? could we not be weatherproofing? could you not be weatherproofing? could they not be weatherproofing?
Perfect
could I not have weatherproofed? could you not have weatherproofed? could he not have weatherproofed? could we not have weatherproofed? could you not have weatherproofed? could they not have weatherproofed?
V-ing perfect
could I not have been weatherproofing? could you not have been weatherproofing? could he not have been weatherproofing? could we not have been weatherproofing? could you not have been weatherproofing? could they not have been weatherproofing?