must invalid
Verbo regular: invalid - invalided- invalided

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must invalid
you must invalid
she must invalid
we must invalid
you must invalid
they must invalid 	I must be invaliding
you must be invaliding
she must be invaliding
we must be invaliding
you must be invaliding
they must be invaliding	I must have invalided
you must have invalided
she must have invalided
we must have invalided
you must have invalided
they must have invalided	I must have been invaliding
you must have been invaliding
she must have been invaliding
we must have been invaliding
you must have been invaliding
they must have been invaliding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not invalid
you must not invalid
she must not invalid
we must not invalid
you must not invalid
they must not invalid 	I must not be invaliding
you must not be invaliding
she must not be invaliding
we must not be invaliding
you must not be invaliding
they must not be invaliding	I must not have invalided
you must not have invalided
she must not have invalided
we must not have invalided
you must not have invalided
they must not have invalided	I must not have been invaliding
you must not have been invaliding
she must not have been invaliding
we must not have been invaliding
you must not have been invaliding
they must not have been invaliding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I invalid?
must you invalid?
must she invalid?
must we invalid?
must you invalid?
must they invalid? 	must I be invaliding?
must you be invaliding?
must she be invaliding?
must we be invaliding?
must you be invaliding?
must they be invaliding? 	must I have invalided?
must you have invalided?
must she have invalided?
must we have invalided?
must you have invalided?
must they have invalided? 	must I have been invaliding?
must you have been invaliding?
must she have been invaliding?
must we have been invaliding?
must you have been invaliding?
must they have been invaliding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not invalid?
must you not invalid?
must she not invalid?
must we not invalid?
must you not invalid?
must they not invalid? 	must I not be invaliding?
must you not be invaliding?
must she not be invaliding?
must we not be invaliding?
must you not be invaliding?
must they not be invaliding? 	must I not have invalided?
must you not have invalided?
must she not have invalided?
must we not have invalided?
must you not have invalided?
must they not have invalided? 	must I not have been invaliding?
must you not have been invaliding?
must she not have been invaliding?
must we not have been invaliding?
must you not have been invaliding?
must they not have been invaliding?