must waterproof
Verbo regular: waterproof - waterproofed- waterproofed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must waterproof
you must waterproof
he must waterproof
we must waterproof
you must waterproof
they must waterproof 	I must be waterproofing
you must be waterproofing
he must be waterproofing
we must be waterproofing
you must be waterproofing
they must be waterproofing	I must have waterproofed
you must have waterproofed
he must have waterproofed
we must have waterproofed
you must have waterproofed
they must have waterproofed	I must have been waterproofing
you must have been waterproofing
he must have been waterproofing
we must have been waterproofing
you must have been waterproofing
they must have been waterproofing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't waterproof
you mustn't waterproof
he mustn't waterproof
we mustn't waterproof
you mustn't waterproof
they mustn't waterproof 	I mustn't be waterproofing
you mustn't be waterproofing
he mustn't be waterproofing
we mustn't be waterproofing
you mustn't be waterproofing
they mustn't be waterproofing	I mustn't have waterproofed
you mustn't have waterproofed
he mustn't have waterproofed
we mustn't have waterproofed
you mustn't have waterproofed
they mustn't have waterproofed	I mustn't have been waterproofing
you mustn't have been waterproofing
he mustn't have been waterproofing
we mustn't have been waterproofing
you mustn't have been waterproofing
they mustn't have been waterproofing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I waterproof?
must you waterproof?
must he waterproof?
must we waterproof?
must you waterproof?
must they waterproof? 	must I be waterproofing?
must you be waterproofing?
must he be waterproofing?
must we be waterproofing?
must you be waterproofing?
must they be waterproofing? 	must I have waterproofed?
must you have waterproofed?
must he have waterproofed?
must we have waterproofed?
must you have waterproofed?
must they have waterproofed? 	must I have been waterproofing?
must you have been waterproofing?
must he have been waterproofing?
must we have been waterproofing?
must you have been waterproofing?
must they have been waterproofing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I waterproof?
mustn't you waterproof?
mustn't he waterproof?
mustn't we waterproof?
mustn't you waterproof?
mustn't they waterproof? 	mustn't I be waterproofing?
mustn't you be waterproofing?
mustn't he be waterproofing?
mustn't we be waterproofing?
mustn't you be waterproofing?
mustn't they be waterproofing? 	mustn't I have waterproofed?
mustn't you have waterproofed?
mustn't he have waterproofed?
mustn't we have waterproofed?
mustn't you have waterproofed?
mustn't they have waterproofed? 	mustn't I have been waterproofing?
mustn't you have been waterproofing?
mustn't he have been waterproofing?
mustn't we have been waterproofing?
mustn't you have been waterproofing?
mustn't they have been waterproofing?