must crater
Verbo regular: crater - cratered- cratered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must crater
you must crater
he must crater
we must crater
you must crater
they must crater 	I must be cratering
you must be cratering
he must be cratering
we must be cratering
you must be cratering
they must be cratering	I must have cratered
you must have cratered
he must have cratered
we must have cratered
you must have cratered
they must have cratered	I must have been cratering
you must have been cratering
he must have been cratering
we must have been cratering
you must have been cratering
they must have been cratering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't crater
you mustn't crater
he mustn't crater
we mustn't crater
you mustn't crater
they mustn't crater 	I mustn't be cratering
you mustn't be cratering
he mustn't be cratering
we mustn't be cratering
you mustn't be cratering
they mustn't be cratering	I mustn't have cratered
you mustn't have cratered
he mustn't have cratered
we mustn't have cratered
you mustn't have cratered
they mustn't have cratered	I mustn't have been cratering
you mustn't have been cratering
he mustn't have been cratering
we mustn't have been cratering
you mustn't have been cratering
they mustn't have been cratering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I crater?
must you crater?
must he crater?
must we crater?
must you crater?
must they crater? 	must I be cratering?
must you be cratering?
must he be cratering?
must we be cratering?
must you be cratering?
must they be cratering? 	must I have cratered?
must you have cratered?
must he have cratered?
must we have cratered?
must you have cratered?
must they have cratered? 	must I have been cratering?
must you have been cratering?
must he have been cratering?
must we have been cratering?
must you have been cratering?
must they have been cratering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I crater?
mustn't you crater?
mustn't he crater?
mustn't we crater?
mustn't you crater?
mustn't they crater? 	mustn't I be cratering?
mustn't you be cratering?
mustn't he be cratering?
mustn't we be cratering?
mustn't you be cratering?
mustn't they be cratering? 	mustn't I have cratered?
mustn't you have cratered?
mustn't he have cratered?
mustn't we have cratered?
mustn't you have cratered?
mustn't they have cratered? 	mustn't I have been cratering?
mustn't you have been cratering?
mustn't he have been cratering?
mustn't we have been cratering?
mustn't you have been cratering?
mustn't they have been cratering?