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 must not research
you must not research
he must not research
we must not research
you must not research
they must not research

V-ing form

I must not be researching
you must not be researching
he must not be researching
we must not be researching
you must not be researching
they must not be researching

Perfect

I must not have researched
you must not have researched
he must not have researched
we must not have researched
you must not have researched
they must not have researched

V-ing perfect

I must not have been researching
you must not have been researching
he must not have been researching
we must not have been researching
you must not have been researching
they must not 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

must I not research?
must you not research?
must he not research?
must we not research?
must you not research?
must they not research?

V-ing form

must I not be researching?
must you not be researching?
must he not be researching?
must we not be researching?
must you not be researching?
must they not be researching?

Perfect

must I not have researched?
must you not have researched?
must he not have researched?
must we not have researched?
must you not have researched?
must they not have researched?

V-ing perfect

must I not have been researching?
must you not have been researching?
must he not have been researching?
must we not have been researching?
must you not have been researching?
must they not have been researching?

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