must interspace
Verbo regular: interspace - interspaced- interspaced

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must interspace
you must interspace
he must interspace
we must interspace
you must interspace
they must interspace 	I must be interspacing
you must be interspacing
he must be interspacing
we must be interspacing
you must be interspacing
they must be interspacing	I must have interspaced
you must have interspaced
he must have interspaced
we must have interspaced
you must have interspaced
they must have interspaced	I must have been interspacing
you must have been interspacing
he must have been interspacing
we must have been interspacing
you must have been interspacing
they must have been interspacing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not interspace
you must not interspace
he must not interspace
we must not interspace
you must not interspace
they must not interspace 	I must not be interspacing
you must not be interspacing
he must not be interspacing
we must not be interspacing
you must not be interspacing
they must not be interspacing	I must not have interspaced
you must not have interspaced
he must not have interspaced
we must not have interspaced
you must not have interspaced
they must not have interspaced	I must not have been interspacing
you must not have been interspacing
he must not have been interspacing
we must not have been interspacing
you must not have been interspacing
they must not have been interspacing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I interspace?
must you interspace?
must he interspace?
must we interspace?
must you interspace?
must they interspace? 	must I be interspacing?
must you be interspacing?
must he be interspacing?
must we be interspacing?
must you be interspacing?
must they be interspacing? 	must I have interspaced?
must you have interspaced?
must he have interspaced?
must we have interspaced?
must you have interspaced?
must they have interspaced? 	must I have been interspacing?
must you have been interspacing?
must he have been interspacing?
must we have been interspacing?
must you have been interspacing?
must they have been interspacing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not interspace?
must you not interspace?
must he not interspace?
must we not interspace?
must you not interspace?
must they not interspace? 	must I not be interspacing?
must you not be interspacing?
must he not be interspacing?
must we not be interspacing?
must you not be interspacing?
must they not be interspacing? 	must I not have interspaced?
must you not have interspaced?
must he not have interspaced?
must we not have interspaced?
must you not have interspaced?
must they not have interspaced? 	must I not have been interspacing?
must you not have been interspacing?
must he not have been interspacing?
must we not have been interspacing?
must you not have been interspacing?
must they not have been interspacing?