must flock
Verbo regular: flock - flocked- flocked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must flock
you must flock
he must flock
we must flock
you must flock
they must flock 	I must be flocking
you must be flocking
he must be flocking
we must be flocking
you must be flocking
they must be flocking	I must have flocked
you must have flocked
he must have flocked
we must have flocked
you must have flocked
they must have flocked	I must have been flocking
you must have been flocking
he must have been flocking
we must have been flocking
you must have been flocking
they must have been flocking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't flock
you mustn't flock
he mustn't flock
we mustn't flock
you mustn't flock
they mustn't flock 	I mustn't be flocking
you mustn't be flocking
he mustn't be flocking
we mustn't be flocking
you mustn't be flocking
they mustn't be flocking	I mustn't have flocked
you mustn't have flocked
he mustn't have flocked
we mustn't have flocked
you mustn't have flocked
they mustn't have flocked	I mustn't have been flocking
you mustn't have been flocking
he mustn't have been flocking
we mustn't have been flocking
you mustn't have been flocking
they mustn't have been flocking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I flock?
must you flock?
must he flock?
must we flock?
must you flock?
must they flock? 	must I be flocking?
must you be flocking?
must he be flocking?
must we be flocking?
must you be flocking?
must they be flocking? 	must I have flocked?
must you have flocked?
must he have flocked?
must we have flocked?
must you have flocked?
must they have flocked? 	must I have been flocking?
must you have been flocking?
must he have been flocking?
must we have been flocking?
must you have been flocking?
must they have been flocking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I flock?
mustn't you flock?
mustn't he flock?
mustn't we flock?
mustn't you flock?
mustn't they flock? 	mustn't I be flocking?
mustn't you be flocking?
mustn't he be flocking?
mustn't we be flocking?
mustn't you be flocking?
mustn't they be flocking? 	mustn't I have flocked?
mustn't you have flocked?
mustn't he have flocked?
mustn't we have flocked?
mustn't you have flocked?
mustn't they have flocked? 	mustn't I have been flocking?
mustn't you have been flocking?
mustn't he have been flocking?
mustn't we have been flocking?
mustn't you have been flocking?
mustn't they have been flocking?