English verb conjugation
MUST FLOCK

Regular verb: flock - flocked - flocked

Affirmation

Simple form	V-ing form
I must flock you must flock she must flock we must flock you must flock they must flock	I must be flocking you must be flocking she must be flocking we must be flocking you must be flocking they must be flocking
Perfect	V-ing perfect
I must have flocked you must have flocked she 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 she must have been flocking we must have been flocking you must have been flocking they must have been flocking

Negation

Simple form	V-ing form
I must not flock you must not flock she must not flock we must not flock you must not flock they must not flock	I must not be flocking you must not be flocking she must not be flocking we must not be flocking you must not be flocking they must not be flocking
Perfect	V-ing perfect
I must not have flocked you must not have flocked she must not have flocked we must not have flocked you must not have flocked they must not have flocked	I must not have been flocking you must not have been flocking she must not have been flocking we must not have been flocking you must not have been flocking they must not have been flocking

Interrogative form

Simple form	V-ing form
must I flock? must you flock? must she flock? must we flock? must you flock? must they flock?	must I be flocking? must you be flocking? must she be flocking? must we be flocking? must you be flocking? must they be flocking?
Perfect	V-ing perfect
must I have flocked? must you have flocked? must she 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 she have been flocking? must we have been flocking? must you have been flocking? must they have been flocking?

Interro-negative form

Simple form	V-ing form
must I not flock? must you not flock? must she not flock? must we not flock? must you not flock? must they not flock?	must I not be flocking? must you not be flocking? must she not be flocking? must we not be flocking? must you not be flocking? must they not be flocking?
Perfect	V-ing perfect
must I not have flocked? must you not have flocked? must she not have flocked? must we not have flocked? must you not have flocked? must they not have flocked?	must I not have been flocking? must you not have been flocking? must she not have been flocking? must we not have been flocking? must you not have been flocking? must they not have been flocking?