must cube
Verbo regular: cube - cubed- cubed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must cube
you must cube
she must cube
we must cube
you must cube
they must cube 	I must be cubing
you must be cubing
she must be cubing
we must be cubing
you must be cubing
they must be cubing	I must have cubed
you must have cubed
she must have cubed
we must have cubed
you must have cubed
they must have cubed	I must have been cubing
you must have been cubing
she must have been cubing
we must have been cubing
you must have been cubing
they must have been cubing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not cube
you must not cube
she must not cube
we must not cube
you must not cube
they must not cube 	I must not be cubing
you must not be cubing
she must not be cubing
we must not be cubing
you must not be cubing
they must not be cubing	I must not have cubed
you must not have cubed
she must not have cubed
we must not have cubed
you must not have cubed
they must not have cubed	I must not have been cubing
you must not have been cubing
she must not have been cubing
we must not have been cubing
you must not have been cubing
they must not have been cubing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I cube?
must you cube?
must she cube?
must we cube?
must you cube?
must they cube? 	must I be cubing?
must you be cubing?
must she be cubing?
must we be cubing?
must you be cubing?
must they be cubing? 	must I have cubed?
must you have cubed?
must she have cubed?
must we have cubed?
must you have cubed?
must they have cubed? 	must I have been cubing?
must you have been cubing?
must she have been cubing?
must we have been cubing?
must you have been cubing?
must they have been cubing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not cube?
must you not cube?
must she not cube?
must we not cube?
must you not cube?
must they not cube? 	must I not be cubing?
must you not be cubing?
must she not be cubing?
must we not be cubing?
must you not be cubing?
must they not be cubing? 	must I not have cubed?
must you not have cubed?
must she not have cubed?
must we not have cubed?
must you not have cubed?
must they not have cubed? 	must I not have been cubing?
must you not have been cubing?
must she not have been cubing?
must we not have been cubing?
must you not have been cubing?
must they not have been cubing?