English verb conjugation
MUST TWITTER

Regular verb: twitter - twittered - twittered

Affirmation

Simple form	V-ing form
I must twitter you must twitter he must twitter we must twitter you must twitter they must twitter	I must be twittering you must be twittering he must be twittering we must be twittering you must be twittering they must be twittering
Perfect	V-ing perfect
I must have twittered you must have twittered he must have twittered we must have twittered you must have twittered they must have twittered	I must have been twittering you must have been twittering he must have been twittering we must have been twittering you must have been twittering they must have been twittering

Negation

Simple form	V-ing form
I mustn't twitter you mustn't twitter he mustn't twitter we mustn't twitter you mustn't twitter they mustn't twitter	I mustn't be twittering you mustn't be twittering he mustn't be twittering we mustn't be twittering you mustn't be twittering they mustn't be twittering
Perfect	V-ing perfect
I mustn't have twittered you mustn't have twittered he mustn't have twittered we mustn't have twittered you mustn't have twittered they mustn't have twittered	I mustn't have been twittering you mustn't have been twittering he mustn't have been twittering we mustn't have been twittering you mustn't have been twittering they mustn't have been twittering

Interrogative form

Simple form	V-ing form
must I twitter? must you twitter? must he twitter? must we twitter? must you twitter? must they twitter?	must I be twittering? must you be twittering? must he be twittering? must we be twittering? must you be twittering? must they be twittering?
Perfect	V-ing perfect
must I have twittered? must you have twittered? must he have twittered? must we have twittered? must you have twittered? must they have twittered?	must I have been twittering? must you have been twittering? must he have been twittering? must we have been twittering? must you have been twittering? must they have been twittering?

Interro-negative form

Simple form	V-ing form
mustn't I twitter? mustn't you twitter? mustn't he twitter? mustn't we twitter? mustn't you twitter? mustn't they twitter?	mustn't I be twittering? mustn't you be twittering? mustn't he be twittering? mustn't we be twittering? mustn't you be twittering? mustn't they be twittering?
Perfect	V-ing perfect
mustn't I have twittered? mustn't you have twittered? mustn't he have twittered? mustn't we have twittered? mustn't you have twittered? mustn't they have twittered?	mustn't I have been twittering? mustn't you have been twittering? mustn't he have been twittering? mustn't we have been twittering? mustn't you have been twittering? mustn't they have been twittering?