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 mustn't flock you mustn't flock she 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 she mustn't be flocking we mustn't be flocking you mustn't be flocking they mustn't be flocking
Perfect	V-ing perfect
I mustn't have flocked you mustn't have flocked she 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 she mustn't have been flocking we mustn't have been flocking you mustn't have been flocking they mustn't 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
mustn't I flock? mustn't you flock? mustn't she 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 she be flocking? mustn't we be flocking? mustn't you be flocking? mustn't they be flocking?
Perfect	V-ing perfect
mustn't I have flocked? mustn't you have flocked? mustn't she 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 she have been flocking? mustn't we have been flocking? mustn't you have been flocking? mustn't they have been flocking?