must unstep
Verbo regular: unstep - unsteped- unsteped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must unstep
you must unstep
he must unstep
we must unstep
you must unstep
they must unstep 	I must be unsteping
you must be unsteping
he must be unsteping
we must be unsteping
you must be unsteping
they must be unsteping	I must have unsteped
you must have unsteped
he must have unsteped
we must have unsteped
you must have unsteped
they must have unsteped	I must have been unsteping
you must have been unsteping
he must have been unsteping
we must have been unsteping
you must have been unsteping
they must have been unsteping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not unstep
you must not unstep
he must not unstep
we must not unstep
you must not unstep
they must not unstep 	I must not be unsteping
you must not be unsteping
he must not be unsteping
we must not be unsteping
you must not be unsteping
they must not be unsteping	I must not have unsteped
you must not have unsteped
he must not have unsteped
we must not have unsteped
you must not have unsteped
they must not have unsteped	I must not have been unsteping
you must not have been unsteping
he must not have been unsteping
we must not have been unsteping
you must not have been unsteping
they must not have been unsteping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I unstep?
must you unstep?
must he unstep?
must we unstep?
must you unstep?
must they unstep? 	must I be unsteping?
must you be unsteping?
must he be unsteping?
must we be unsteping?
must you be unsteping?
must they be unsteping? 	must I have unsteped?
must you have unsteped?
must he have unsteped?
must we have unsteped?
must you have unsteped?
must they have unsteped? 	must I have been unsteping?
must you have been unsteping?
must he have been unsteping?
must we have been unsteping?
must you have been unsteping?
must they have been unsteping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not unstep?
must you not unstep?
must he not unstep?
must we not unstep?
must you not unstep?
must they not unstep? 	must I not be unsteping?
must you not be unsteping?
must he not be unsteping?
must we not be unsteping?
must you not be unsteping?
must they not be unsteping? 	must I not have unsteped?
must you not have unsteped?
must he not have unsteped?
must we not have unsteped?
must you not have unsteped?
must they not have unsteped? 	must I not have been unsteping?
must you not have been unsteping?
must he not have been unsteping?
must we not have been unsteping?
must you not have been unsteping?
must they not have been unsteping?