must erect
Verbo regular: erect - erected- erected

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must erect
you must erect
he must erect
we must erect
you must erect
they must erect 	I must be erecting
you must be erecting
he must be erecting
we must be erecting
you must be erecting
they must be erecting	I must have erected
you must have erected
he must have erected
we must have erected
you must have erected
they must have erected	I must have been erecting
you must have been erecting
he must have been erecting
we must have been erecting
you must have been erecting
they must have been erecting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not erect
you must not erect
he must not erect
we must not erect
you must not erect
they must not erect 	I must not be erecting
you must not be erecting
he must not be erecting
we must not be erecting
you must not be erecting
they must not be erecting	I must not have erected
you must not have erected
he must not have erected
we must not have erected
you must not have erected
they must not have erected	I must not have been erecting
you must not have been erecting
he must not have been erecting
we must not have been erecting
you must not have been erecting
they must not have been erecting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I erect?
must you erect?
must he erect?
must we erect?
must you erect?
must they erect? 	must I be erecting?
must you be erecting?
must he be erecting?
must we be erecting?
must you be erecting?
must they be erecting? 	must I have erected?
must you have erected?
must he have erected?
must we have erected?
must you have erected?
must they have erected? 	must I have been erecting?
must you have been erecting?
must he have been erecting?
must we have been erecting?
must you have been erecting?
must they have been erecting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not erect?
must you not erect?
must he not erect?
must we not erect?
must you not erect?
must they not erect? 	must I not be erecting?
must you not be erecting?
must he not be erecting?
must we not be erecting?
must you not be erecting?
must they not be erecting? 	must I not have erected?
must you not have erected?
must he not have erected?
must we not have erected?
must you not have erected?
must they not have erected? 	must I not have been erecting?
must you not have been erecting?
must he not have been erecting?
must we not have been erecting?
must you not have been erecting?
must they not have been erecting?