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
she must secure
we must secure
you must secure
they must secure 	I must be securing
you must be securing
she must be securing
we must be securing
you must be securing
they must be securing	I must have secured
you must have secured
she 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
she 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
she 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
she 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
she 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
she 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 she secure?
must we secure?
must you secure?
must they secure? 	must I be securing?
must you be securing?
must she be securing?
must we be securing?
must you be securing?
must they be securing? 	must I have secured?
must you have secured?
must she 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 she 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 she 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 she 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 she 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 she not have been securing?
must we not have been securing?
must you not have been securing?
must they not have been securing?