must coffin
Verbo regular: coffin - coffined- coffined

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not coffin
you must not coffin
he must not coffin
we must not coffin
you must not coffin
they must not coffin 	I must not be coffining
you must not be coffining
he must not be coffining
we must not be coffining
you must not be coffining
they must not be coffining	I must not have coffined
you must not have coffined
he must not have coffined
we must not have coffined
you must not have coffined
they must not have coffined	I must not have been coffining
you must not have been coffining
he must not have been coffining
we must not have been coffining
you must not have been coffining
they must not have been coffining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not coffin?
must you not coffin?
must he not coffin?
must we not coffin?
must you not coffin?
must they not coffin? 	must I not be coffining?
must you not be coffining?
must he not be coffining?
must we not be coffining?
must you not be coffining?
must they not be coffining? 	must I not have coffined?
must you not have coffined?
must he not have coffined?
must we not have coffined?
must you not have coffined?
must they not have coffined? 	must I not have been coffining?
must you not have been coffining?
must he not have been coffining?
must we not have been coffining?
must you not have been coffining?
must they not have been coffining?