must preassign
Verbo regular: preassign - preassigned- preassigned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must preassign
you must preassign
she must preassign
we must preassign
you must preassign
they must preassign 	I must be preassigning
you must be preassigning
she must be preassigning
we must be preassigning
you must be preassigning
they must be preassigning	I must have preassigned
you must have preassigned
she must have preassigned
we must have preassigned
you must have preassigned
they must have preassigned	I must have been preassigning
you must have been preassigning
she must have been preassigning
we must have been preassigning
you must have been preassigning
they must have been preassigning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not preassign
you must not preassign
she must not preassign
we must not preassign
you must not preassign
they must not preassign 	I must not be preassigning
you must not be preassigning
she must not be preassigning
we must not be preassigning
you must not be preassigning
they must not be preassigning	I must not have preassigned
you must not have preassigned
she must not have preassigned
we must not have preassigned
you must not have preassigned
they must not have preassigned	I must not have been preassigning
you must not have been preassigning
she must not have been preassigning
we must not have been preassigning
you must not have been preassigning
they must not have been preassigning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I preassign?
must you preassign?
must she preassign?
must we preassign?
must you preassign?
must they preassign? 	must I be preassigning?
must you be preassigning?
must she be preassigning?
must we be preassigning?
must you be preassigning?
must they be preassigning? 	must I have preassigned?
must you have preassigned?
must she have preassigned?
must we have preassigned?
must you have preassigned?
must they have preassigned? 	must I have been preassigning?
must you have been preassigning?
must she have been preassigning?
must we have been preassigning?
must you have been preassigning?
must they have been preassigning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not preassign?
must you not preassign?
must she not preassign?
must we not preassign?
must you not preassign?
must they not preassign? 	must I not be preassigning?
must you not be preassigning?
must she not be preassigning?
must we not be preassigning?
must you not be preassigning?
must they not be preassigning? 	must I not have preassigned?
must you not have preassigned?
must she not have preassigned?
must we not have preassigned?
must you not have preassigned?
must they not have preassigned? 	must I not have been preassigning?
must you not have been preassigning?
must she not have been preassigning?
must we not have been preassigning?
must you not have been preassigning?
must they not have been preassigning?