must coffin
Verbo regular: coffin - coffined- coffined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must coffin
you must coffin
he must coffin
we must coffin
you must coffin
they must coffin 	I must be coffining
you must be coffining
he must be coffining
we must be coffining
you must be coffining
they must be coffining	I must have coffined
you must have coffined
he must have coffined
we must have coffined
you must have coffined
they must have coffined	I must have been coffining
you must have been coffining
he must have been coffining
we must have been coffining
you must have been coffining
they must have been coffining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't coffin
you mustn't coffin
he mustn't coffin
we mustn't coffin
you mustn't coffin
they mustn't coffin 	I mustn't be coffining
you mustn't be coffining
he mustn't be coffining
we mustn't be coffining
you mustn't be coffining
they mustn't be coffining	I mustn't have coffined
you mustn't have coffined
he mustn't have coffined
we mustn't have coffined
you mustn't have coffined
they mustn't have coffined	I mustn't have been coffining
you mustn't have been coffining
he mustn't have been coffining
we mustn't have been coffining
you mustn't have been coffining
they mustn't have been coffining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I coffin?
must you coffin?
must he coffin?
must we coffin?
must you coffin?
must they coffin? 	must I be coffining?
must you be coffining?
must he be coffining?
must we be coffining?
must you be coffining?
must they be coffining? 	must I have coffined?
must you have coffined?
must he have coffined?
must we have coffined?
must you have coffined?
must they have coffined? 	must I have been coffining?
must you have been coffining?
must he have been coffining?
must we have been coffining?
must you have been coffining?
must they have been coffining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I coffin?
mustn't you coffin?
mustn't he coffin?
mustn't we coffin?
mustn't you coffin?
mustn't they coffin? 	mustn't I be coffining?
mustn't you be coffining?
mustn't he be coffining?
mustn't we be coffining?
mustn't you be coffining?
mustn't they be coffining? 	mustn't I have coffined?
mustn't you have coffined?
mustn't he have coffined?
mustn't we have coffined?
mustn't you have coffined?
mustn't they have coffined? 	mustn't I have been coffining?
mustn't you have been coffining?
mustn't he have been coffining?
mustn't we have been coffining?
mustn't you have been coffining?
mustn't they have been coffining?