must preinstruct
Verbo regular: preinstruct - preinstructed- preinstructed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must preinstruct
you must preinstruct
he must preinstruct
we must preinstruct
you must preinstruct
they must preinstruct 	I must be preinstructing
you must be preinstructing
he must be preinstructing
we must be preinstructing
you must be preinstructing
they must be preinstructing	I must have preinstructed
you must have preinstructed
he must have preinstructed
we must have preinstructed
you must have preinstructed
they must have preinstructed	I must have been preinstructing
you must have been preinstructing
he must have been preinstructing
we must have been preinstructing
you must have been preinstructing
they must have been preinstructing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not preinstruct
you must not preinstruct
he must not preinstruct
we must not preinstruct
you must not preinstruct
they must not preinstruct 	I must not be preinstructing
you must not be preinstructing
he must not be preinstructing
we must not be preinstructing
you must not be preinstructing
they must not be preinstructing	I must not have preinstructed
you must not have preinstructed
he must not have preinstructed
we must not have preinstructed
you must not have preinstructed
they must not have preinstructed	I must not have been preinstructing
you must not have been preinstructing
he must not have been preinstructing
we must not have been preinstructing
you must not have been preinstructing
they must not have been preinstructing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I preinstruct?
must you preinstruct?
must he preinstruct?
must we preinstruct?
must you preinstruct?
must they preinstruct? 	must I be preinstructing?
must you be preinstructing?
must he be preinstructing?
must we be preinstructing?
must you be preinstructing?
must they be preinstructing? 	must I have preinstructed?
must you have preinstructed?
must he have preinstructed?
must we have preinstructed?
must you have preinstructed?
must they have preinstructed? 	must I have been preinstructing?
must you have been preinstructing?
must he have been preinstructing?
must we have been preinstructing?
must you have been preinstructing?
must they have been preinstructing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not preinstruct?
must you not preinstruct?
must he not preinstruct?
must we not preinstruct?
must you not preinstruct?
must they not preinstruct? 	must I not be preinstructing?
must you not be preinstructing?
must he not be preinstructing?
must we not be preinstructing?
must you not be preinstructing?
must they not be preinstructing? 	must I not have preinstructed?
must you not have preinstructed?
must he not have preinstructed?
must we not have preinstructed?
must you not have preinstructed?
must they not have preinstructed? 	must I not have been preinstructing?
must you not have been preinstructing?
must he not have been preinstructing?
must we not have been preinstructing?
must you not have been preinstructing?
must they not have been preinstructing?