Cuidado, este verbo pode não existir, a conjugação é dada como exemplo.
Afirmação
Forma simple
I must gasser you must gasser he must gasser we must gasser you must gasser they must gasser
Forma com V-ing
I must be gassering you must be gassering he must be gassering we must be gassering you must be gassering they must be gassering
Perfeito
I must have gassered you must have gassered he must have gassered we must have gassered you must have gassered they must have gassered
Perfeito com V-ing
I must have been gassering you must have been gassering he must have been gassering we must have been gassering you must have been gassering they must have been gassering
Negação
Forma simple
I mustn't gasser you mustn't gasser he mustn't gasser we mustn't gasser you mustn't gasser they mustn't gasser
Forma com V-ing
I mustn't be gassering you mustn't be gassering he mustn't be gassering we mustn't be gassering you mustn't be gassering they mustn't be gassering
Perfeito
I mustn't have gassered you mustn't have gassered he mustn't have gassered we mustn't have gassered you mustn't have gassered they mustn't have gassered
Perfeito com V-ing
I mustn't have been gassering you mustn't have been gassering he mustn't have been gassering we mustn't have been gassering you mustn't have been gassering they mustn't have been gassering
Forma interrogativa
Forma simple
must I gasser? must you gasser? must he gasser? must we gasser? must you gasser? must they gasser?
Forma com V-ing
must I be gassering? must you be gassering? must he be gassering? must we be gassering? must you be gassering? must they be gassering?
Perfeito
must I have gassered? must you have gassered? must he have gassered? must we have gassered? must you have gassered? must they have gassered?
Perfeito com V-ing
must I have been gassering? must you have been gassering? must he have been gassering? must we have been gassering? must you have been gassering? must they have been gassering?
Forma interro-Negação
Forma simple
mustn't I gasser? mustn't you gasser? mustn't he gasser? mustn't we gasser? mustn't you gasser? mustn't they gasser?
Forma com V-ing
mustn't I be gassering? mustn't you be gassering? mustn't he be gassering? mustn't we be gassering? mustn't you be gassering? mustn't they be gassering?
Perfeito
mustn't I have gassered? mustn't you have gassered? mustn't he have gassered? mustn't we have gassered? mustn't you have gassered? mustn't they have gassered?
Perfeito com V-ing
mustn't I have been gassering? mustn't you have been gassering? mustn't he have been gassering? mustn't we have been gassering? mustn't you have been gassering? mustn't they have been gassering?