must secure
Verbo regular: secure - secured- secured

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must secure
you must secure
he must secure
we must secure
you must secure
they must secure 	I must be securing
you must be securing
he must be securing
we must be securing
you must be securing
they must be securing	I must have secured
you must have secured
he must have secured
we must have secured
you must have secured
they must have secured	I must have been securing
you must have been securing
he must have been securing
we must have been securing
you must have been securing
they must have been securing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not secure
you must not secure
he must not secure
we must not secure
you must not secure
they must not secure 	I must not be securing
you must not be securing
he must not be securing
we must not be securing
you must not be securing
they must not be securing	I must not have secured
you must not have secured
he must not have secured
we must not have secured
you must not have secured
they must not have secured	I must not have been securing
you must not have been securing
he must not have been securing
we must not have been securing
you must not have been securing
they must not have been securing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I secure?
must you secure?
must he secure?
must we secure?
must you secure?
must they secure? 	must I be securing?
must you be securing?
must he be securing?
must we be securing?
must you be securing?
must they be securing? 	must I have secured?
must you have secured?
must he have secured?
must we have secured?
must you have secured?
must they have secured? 	must I have been securing?
must you have been securing?
must he have been securing?
must we have been securing?
must you have been securing?
must they have been securing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not secure?
must you not secure?
must he not secure?
must we not secure?
must you not secure?
must they not secure? 	must I not be securing?
must you not be securing?
must he not be securing?
must we not be securing?
must you not be securing?
must they not be securing? 	must I not have secured?
must you not have secured?
must he not have secured?
must we not have secured?
must you not have secured?
must they not have secured? 	must I not have been securing?
must you not have been securing?
must he not have been securing?
must we not have been securing?
must you not have been securing?
must they not have been securing?