English verb conjugation
MUST TWITCH

Regular verb: twitch - twitched - twitched

Affirmation

Simple form	V-ing form
I must twitch you must twitch she must twitch we must twitch you must twitch they must twitch	I must be twitching you must be twitching she must be twitching we must be twitching you must be twitching they must be twitching
Perfect	V-ing perfect
I must have twitched you must have twitched she must have twitched we must have twitched you must have twitched they must have twitched	I must have been twitching you must have been twitching she must have been twitching we must have been twitching you must have been twitching they must have been twitching

Negation

Simple form	V-ing form
I must not twitch you must not twitch she must not twitch we must not twitch you must not twitch they must not twitch	I must not be twitching you must not be twitching she must not be twitching we must not be twitching you must not be twitching they must not be twitching
Perfect	V-ing perfect
I must not have twitched you must not have twitched she must not have twitched we must not have twitched you must not have twitched they must not have twitched	I must not have been twitching you must not have been twitching she must not have been twitching we must not have been twitching you must not have been twitching they must not have been twitching

Interrogative form

Simple form	V-ing form
must I twitch? must you twitch? must she twitch? must we twitch? must you twitch? must they twitch?	must I be twitching? must you be twitching? must she be twitching? must we be twitching? must you be twitching? must they be twitching?
Perfect	V-ing perfect
must I have twitched? must you have twitched? must she have twitched? must we have twitched? must you have twitched? must they have twitched?	must I have been twitching? must you have been twitching? must she have been twitching? must we have been twitching? must you have been twitching? must they have been twitching?

Interro-negative form

Simple form	V-ing form
must I not twitch? must you not twitch? must she not twitch? must we not twitch? must you not twitch? must they not twitch?	must I not be twitching? must you not be twitching? must she not be twitching? must we not be twitching? must you not be twitching? must they not be twitching?
Perfect	V-ing perfect
must I not have twitched? must you not have twitched? must she not have twitched? must we not have twitched? must you not have twitched? must they not have twitched?	must I not have been twitching? must you not have been twitching? must she not have been twitching? must we not have been twitching? must you not have been twitching? must they not have been twitching?