English verb conjugation
MUST TWITCH

Regular verb: twitch - twitched - twitched

Affirmation

Simple form	V-ing form
I must twitch you must twitch he must twitch we must twitch you must twitch they must twitch	I must be twitching you must be twitching he 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 he 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 he 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 he 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 he 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 he 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 he 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 he twitch? must we twitch? must you twitch? must they twitch?	must I be twitching? must you be twitching? must he 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 he 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 he 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 he 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 he 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 he 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 he not have been twitching? must we not have been twitching? must you not have been twitching? must they not have been twitching?