must ken
Verbo regular: ken - kened- kened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must ken
you must ken
he must ken
we must ken
you must ken
they must ken 	I must be kening
you must be kening
he must be kening
we must be kening
you must be kening
they must be kening	I must have kened
you must have kened
he must have kened
we must have kened
you must have kened
they must have kened	I must have been kening
you must have been kening
he must have been kening
we must have been kening
you must have been kening
they must have been kening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not ken
you must not ken
he must not ken
we must not ken
you must not ken
they must not ken 	I must not be kening
you must not be kening
he must not be kening
we must not be kening
you must not be kening
they must not be kening	I must not have kened
you must not have kened
he must not have kened
we must not have kened
you must not have kened
they must not have kened	I must not have been kening
you must not have been kening
he must not have been kening
we must not have been kening
you must not have been kening
they must not have been kening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I ken?
must you ken?
must he ken?
must we ken?
must you ken?
must they ken? 	must I be kening?
must you be kening?
must he be kening?
must we be kening?
must you be kening?
must they be kening? 	must I have kened?
must you have kened?
must he have kened?
must we have kened?
must you have kened?
must they have kened? 	must I have been kening?
must you have been kening?
must he have been kening?
must we have been kening?
must you have been kening?
must they have been kening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not ken?
must you not ken?
must he not ken?
must we not ken?
must you not ken?
must they not ken? 	must I not be kening?
must you not be kening?
must he not be kening?
must we not be kening?
must you not be kening?
must they not be kening? 	must I not have kened?
must you not have kened?
must he not have kened?
must we not have kened?
must you not have kened?
must they not have kened? 	must I not have been kening?
must you not have been kening?
must he not have been kening?
must we not have been kening?
must you not have been kening?
must they not have been kening?