English verb conjugation
MUST INTEREST

Regular verb: interest - interested - interested

Affirmation

Simple form	V-ing form
I must interest you must interest he must interest we must interest you must interest they must interest	I must be interesting you must be interesting he must be interesting we must be interesting you must be interesting they must be interesting
Perfect	V-ing perfect
I must have interested you must have interested he must have interested we must have interested you must have interested they must have interested	I must have been interesting you must have been interesting he must have been interesting we must have been interesting you must have been interesting they must have been interesting

Negation

Simple form	V-ing form
I mustn't interest you mustn't interest he mustn't interest we mustn't interest you mustn't interest they mustn't interest	I mustn't be interesting you mustn't be interesting he mustn't be interesting we mustn't be interesting you mustn't be interesting they mustn't be interesting
Perfect	V-ing perfect
I mustn't have interested you mustn't have interested he mustn't have interested we mustn't have interested you mustn't have interested they mustn't have interested	I mustn't have been interesting you mustn't have been interesting he mustn't have been interesting we mustn't have been interesting you mustn't have been interesting they mustn't have been interesting

Interrogative form

Simple form	V-ing form
must I interest? must you interest? must he interest? must we interest? must you interest? must they interest?	must I be interesting? must you be interesting? must he be interesting? must we be interesting? must you be interesting? must they be interesting?
Perfect	V-ing perfect
must I have interested? must you have interested? must he have interested? must we have interested? must you have interested? must they have interested?	must I have been interesting? must you have been interesting? must he have been interesting? must we have been interesting? must you have been interesting? must they have been interesting?

Interro-negative form

Simple form	V-ing form
mustn't I interest? mustn't you interest? mustn't he interest? mustn't we interest? mustn't you interest? mustn't they interest?	mustn't I be interesting? mustn't you be interesting? mustn't he be interesting? mustn't we be interesting? mustn't you be interesting? mustn't they be interesting?
Perfect	V-ing perfect
mustn't I have interested? mustn't you have interested? mustn't he have interested? mustn't we have interested? mustn't you have interested? mustn't they have interested?	mustn't I have been interesting? mustn't you have been interesting? mustn't he have been interesting? mustn't we have been interesting? mustn't you have been interesting? mustn't they have been interesting?