must half-open
Verbo regular: half-open - half-opened- half-opened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must half-open
you must half-open
she must half-open
we must half-open
you must half-open
they must half-open 	I must be half-opening
you must be half-opening
she must be half-opening
we must be half-opening
you must be half-opening
they must be half-opening	I must have half-opened
you must have half-opened
she must have half-opened
we must have half-opened
you must have half-opened
they must have half-opened	I must have been half-opening
you must have been half-opening
she must have been half-opening
we must have been half-opening
you must have been half-opening
they must have been half-opening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not half-open
you must not half-open
she must not half-open
we must not half-open
you must not half-open
they must not half-open 	I must not be half-opening
you must not be half-opening
she must not be half-opening
we must not be half-opening
you must not be half-opening
they must not be half-opening	I must not have half-opened
you must not have half-opened
she must not have half-opened
we must not have half-opened
you must not have half-opened
they must not have half-opened	I must not have been half-opening
you must not have been half-opening
she must not have been half-opening
we must not have been half-opening
you must not have been half-opening
they must not have been half-opening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I half-open?
must you half-open?
must she half-open?
must we half-open?
must you half-open?
must they half-open? 	must I be half-opening?
must you be half-opening?
must she be half-opening?
must we be half-opening?
must you be half-opening?
must they be half-opening? 	must I have half-opened?
must you have half-opened?
must she have half-opened?
must we have half-opened?
must you have half-opened?
must they have half-opened? 	must I have been half-opening?
must you have been half-opening?
must she have been half-opening?
must we have been half-opening?
must you have been half-opening?
must they have been half-opening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not half-open?
must you not half-open?
must she not half-open?
must we not half-open?
must you not half-open?
must they not half-open? 	must I not be half-opening?
must you not be half-opening?
must she not be half-opening?
must we not be half-opening?
must you not be half-opening?
must they not be half-opening? 	must I not have half-opened?
must you not have half-opened?
must she not have half-opened?
must we not have half-opened?
must you not have half-opened?
must they not have half-opened? 	must I not have been half-opening?
must you not have been half-opening?
must she not have been half-opening?
must we not have been half-opening?
must you not have been half-opening?
must they not have been half-opening?