I must waterproof you must waterproof he must waterproof we must waterproof you must waterproof they must waterproof
Forme en V-ing
I must be waterproofing you must be waterproofing he must be waterproofing we must be waterproofing you must be waterproofing they must be waterproofing
Perfect
I must have waterproofed you must have waterproofed he must have waterproofed we must have waterproofed you must have waterproofed they must have waterproofed
Perfect en V-ing
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
Négation
Forme simple
I mustn't waterproof you mustn't waterproof he mustn't waterproof we mustn't waterproof you mustn't waterproof they mustn't waterproof
Forme en V-ing
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
Perfect
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
Perfect en V-ing
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
Forme interrogative
Forme simple
must I waterproof? must you waterproof? must he waterproof? must we waterproof? must you waterproof? must they waterproof?
Forme en V-ing
must I be waterproofing? must you be waterproofing? must he be waterproofing? must we be waterproofing? must you be waterproofing? must they be waterproofing?
Perfect
must I have waterproofed? must you have waterproofed? must he have waterproofed? must we have waterproofed? must you have waterproofed? must they have waterproofed?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
mustn't I waterproof? mustn't you waterproof? mustn't he waterproof? mustn't we waterproof? mustn't you waterproof? mustn't they waterproof?
Forme en V-ing
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?
Perfect
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?
Perfect en V-ing
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?