could waterproof
Verbo regular: waterproof - waterproofed- waterproofed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could waterproof
you could waterproof
he could waterproof
we could waterproof
you could waterproof
they could waterproof 	I could be waterproofing
you could be waterproofing
he could be waterproofing
we could be waterproofing
you could be waterproofing
they could be waterproofing	I could have waterproofed
you could have waterproofed
he could have waterproofed
we could have waterproofed
you could have waterproofed
they could have waterproofed	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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not waterproof
you could not waterproof
he could not waterproof
we could not waterproof
you could not waterproof
they could not waterproof 	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	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	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	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I waterproof?
could you waterproof?
could he waterproof?
could we waterproof?
could you waterproof?
could they waterproof? 	could I be waterproofing?
could you be waterproofing?
could he be waterproofing?
could we be waterproofing?
could you be waterproofing?
could they be waterproofing? 	could I have waterproofed?
could you have waterproofed?
could he have waterproofed?
could we have waterproofed?
could you have waterproofed?
could they have waterproofed? 	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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not waterproof?
could you not waterproof?
could he not waterproof?
could we not waterproof?
could you not waterproof?
could they not waterproof? 	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? 	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? 	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?