English verb conjugation
MUST INTER

Regular verb: inter - interred - interred

Affirmation

Simple form	V-ing form
I must inter you must inter he must inter we must inter you must inter they must inter	I must be interring you must be interring he must be interring we must be interring you must be interring they must be interring
Perfect	V-ing perfect
I must have interred you must have interred he must have interred we must have interred you must have interred they must have interred	I must have been interring you must have been interring he must have been interring we must have been interring you must have been interring they must have been interring

Negation

Simple form	V-ing form
I mustn't inter you mustn't inter he mustn't inter we mustn't inter you mustn't inter they mustn't inter	I mustn't be interring you mustn't be interring he mustn't be interring we mustn't be interring you mustn't be interring they mustn't be interring
Perfect	V-ing perfect
I mustn't have interred you mustn't have interred he mustn't have interred we mustn't have interred you mustn't have interred they mustn't have interred	I mustn't have been interring you mustn't have been interring he mustn't have been interring we mustn't have been interring you mustn't have been interring they mustn't have been interring

Interrogative form

Simple form	V-ing form
must I inter? must you inter? must he inter? must we inter? must you inter? must they inter?	must I be interring? must you be interring? must he be interring? must we be interring? must you be interring? must they be interring?
Perfect	V-ing perfect
must I have interred? must you have interred? must he have interred? must we have interred? must you have interred? must they have interred?	must I have been interring? must you have been interring? must he have been interring? must we have been interring? must you have been interring? must they have been interring?

Interro-negative form

Simple form	V-ing form
mustn't I inter? mustn't you inter? mustn't he inter? mustn't we inter? mustn't you inter? mustn't they inter?	mustn't I be interring? mustn't you be interring? mustn't he be interring? mustn't we be interring? mustn't you be interring? mustn't they be interring?
Perfect	V-ing perfect
mustn't I have interred? mustn't you have interred? mustn't he have interred? mustn't we have interred? mustn't you have interred? mustn't they have interred?	mustn't I have been interring? mustn't you have been interring? mustn't he have been interring? mustn't we have been interring? mustn't you have been interring? mustn't they have been interring?