I could waterproof you could waterproof he could waterproof we could waterproof you could waterproof they could waterproof
Forme en V-ing
I could be waterproofing you could be waterproofing he could be waterproofing we could be waterproofing you could be waterproofing they could be waterproofing
Perfect
I could have waterproofed you could have waterproofed he could have waterproofed we could have waterproofed you could have waterproofed they could have waterproofed
Perfect en V-ing
I could have been waterproofing you could have been waterproofing he could have been waterproofing we could have been waterproofing you could have been waterproofing they could have been waterproofing
Négation
Forme simple
I could not waterproof you could not waterproof he could not waterproof we could not waterproof you could not waterproof they could not waterproof
Forme en V-ing
I could not be waterproofing you could not be waterproofing he could not be waterproofing we could not be waterproofing you could not be waterproofing they could not be waterproofing
Perfect
I could not have waterproofed you could not have waterproofed he could not have waterproofed we could not have waterproofed you could not have waterproofed they could not have waterproofed
Perfect en V-ing
I could not have been waterproofing you could not have been waterproofing he could not have been waterproofing we could not have been waterproofing you could not have been waterproofing they could not have been waterproofing
Forme interrogative
Forme simple
could I waterproof? could you waterproof? could he waterproof? could we waterproof? could you waterproof? could they waterproof?
Forme en V-ing
could I be waterproofing? could you be waterproofing? could he be waterproofing? could we be waterproofing? could you be waterproofing? could they be waterproofing?
Perfect
could I have waterproofed? could you have waterproofed? could he have waterproofed? could we have waterproofed? could you have waterproofed? could they have waterproofed?
Perfect en V-ing
could I have been waterproofing? could you have been waterproofing? could he have been waterproofing? could we have been waterproofing? could you have been waterproofing? could they have been waterproofing?
Forme interro-négative
Forme simple
could I not waterproof? could you not waterproof? could he not waterproof? could we not waterproof? could you not waterproof? could they not waterproof?
Forme en V-ing
could I not be waterproofing? could you not be waterproofing? could he not be waterproofing? could we not be waterproofing? could you not be waterproofing? could they not be waterproofing?
Perfect
could I not have waterproofed? could you not have waterproofed? could he not have waterproofed? could we not have waterproofed? could you not have waterproofed? could they not have waterproofed?
Perfect en V-ing
could I not have been waterproofing? could you not have been waterproofing? could he not have been waterproofing? could we not have been waterproofing? could you not have been waterproofing? could they not have been waterproofing?