must decide
Verbo regular: decide - decided- decided

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must decide
you must decide
she must decide
we must decide
you must decide
they must decide 	I must be deciding
you must be deciding
she must be deciding
we must be deciding
you must be deciding
they must be deciding	I must have decided
you must have decided
she must have decided
we must have decided
you must have decided
they must have decided	I must have been deciding
you must have been deciding
she must have been deciding
we must have been deciding
you must have been deciding
they must have been deciding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not decide
you must not decide
she must not decide
we must not decide
you must not decide
they must not decide 	I must not be deciding
you must not be deciding
she must not be deciding
we must not be deciding
you must not be deciding
they must not be deciding	I must not have decided
you must not have decided
she must not have decided
we must not have decided
you must not have decided
they must not have decided	I must not have been deciding
you must not have been deciding
she must not have been deciding
we must not have been deciding
you must not have been deciding
they must not have been deciding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I decide?
must you decide?
must she decide?
must we decide?
must you decide?
must they decide? 	must I be deciding?
must you be deciding?
must she be deciding?
must we be deciding?
must you be deciding?
must they be deciding? 	must I have decided?
must you have decided?
must she have decided?
must we have decided?
must you have decided?
must they have decided? 	must I have been deciding?
must you have been deciding?
must she have been deciding?
must we have been deciding?
must you have been deciding?
must they have been deciding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not decide?
must you not decide?
must she not decide?
must we not decide?
must you not decide?
must they not decide? 	must I not be deciding?
must you not be deciding?
must she not be deciding?
must we not be deciding?
must you not be deciding?
must they not be deciding? 	must I not have decided?
must you not have decided?
must she not have decided?
must we not have decided?
must you not have decided?
must they not have decided? 	must I not have been deciding?
must you not have been deciding?
must she not have been deciding?
must we not have been deciding?
must you not have been deciding?
must they not have been deciding?