must precede
Verbo regular: precede - preceded- preceded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must precede
you must precede
she must precede
we must precede
you must precede
they must precede 	I must be preceding
you must be preceding
she must be preceding
we must be preceding
you must be preceding
they must be preceding	I must have preceded
you must have preceded
she must have preceded
we must have preceded
you must have preceded
they must have preceded	I must have been preceding
you must have been preceding
she must have been preceding
we must have been preceding
you must have been preceding
they must have been preceding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not precede
you must not precede
she must not precede
we must not precede
you must not precede
they must not precede 	I must not be preceding
you must not be preceding
she must not be preceding
we must not be preceding
you must not be preceding
they must not be preceding	I must not have preceded
you must not have preceded
she must not have preceded
we must not have preceded
you must not have preceded
they must not have preceded	I must not have been preceding
you must not have been preceding
she must not have been preceding
we must not have been preceding
you must not have been preceding
they must not have been preceding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I precede?
must you precede?
must she precede?
must we precede?
must you precede?
must they precede? 	must I be preceding?
must you be preceding?
must she be preceding?
must we be preceding?
must you be preceding?
must they be preceding? 	must I have preceded?
must you have preceded?
must she have preceded?
must we have preceded?
must you have preceded?
must they have preceded? 	must I have been preceding?
must you have been preceding?
must she have been preceding?
must we have been preceding?
must you have been preceding?
must they have been preceding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not precede?
must you not precede?
must she not precede?
must we not precede?
must you not precede?
must they not precede? 	must I not be preceding?
must you not be preceding?
must she not be preceding?
must we not be preceding?
must you not be preceding?
must they not be preceding? 	must I not have preceded?
must you not have preceded?
must she not have preceded?
must we not have preceded?
must you not have preceded?
must they not have preceded? 	must I not have been preceding?
must you not have been preceding?
must she not have been preceding?
must we not have been preceding?
must you not have been preceding?
must they not have been preceding?