English verb conjugation MUST RESEARCH

Regular verb: research - researched - researched

Affirmation

Simple form

I must research
you must research
he must research
we must research
you must research
they must research

V-ing form

I must be researching
you must be researching
he must be researching
we must be researching
you must be researching
they must be researching

Perfect

I must have researched
you must have researched
he must have researched
we must have researched
you must have researched
they must have researched

V-ing perfect

I must have been researching
you must have been researching
he must have been researching
we must have been researching
you must have been researching
they must have been researching

Negation

Simple form

I mustn't research
you mustn't research
he mustn't research
we mustn't research
you mustn't research
they mustn't research

V-ing form

I mustn't be researching
you mustn't be researching
he mustn't be researching
we mustn't be researching
you mustn't be researching
they mustn't be researching

Perfect

I mustn't have researched
you mustn't have researched
he mustn't have researched
we mustn't have researched
you mustn't have researched
they mustn't have researched

V-ing perfect

I mustn't have been researching
you mustn't have been researching
he mustn't have been researching
we mustn't have been researching
you mustn't have been researching
they mustn't have been researching

Interrogative form

Simple form

must I research?
must you research?
must he research?
must we research?
must you research?
must they research?

V-ing form

must I be researching?
must you be researching?
must he be researching?
must we be researching?
must you be researching?
must they be researching?

Perfect

must I have researched?
must you have researched?
must he have researched?
must we have researched?
must you have researched?
must they have researched?

V-ing perfect

must I have been researching?
must you have been researching?
must he have been researching?
must we have been researching?
must you have been researching?
must they have been researching?

Interro-negative form

Simple form

mustn't I research?
mustn't you research?
mustn't he research?
mustn't we research?
mustn't you research?
mustn't they research?

V-ing form

mustn't I be researching?
mustn't you be researching?
mustn't he be researching?
mustn't we be researching?
mustn't you be researching?
mustn't they be researching?

Perfect

mustn't I have researched?
mustn't you have researched?
mustn't he have researched?
mustn't we have researched?
mustn't you have researched?
mustn't they have researched?

V-ing perfect

mustn't I have been researching?
mustn't you have been researching?
mustn't he have been researching?
mustn't we have been researching?
mustn't you have been researching?
mustn't they have been researching?

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