English verb conjugation CAN RESEARCH

Regular verb: research - researched - researched

Affirmation

Simple form

I can research
you can research
he can research
we can research
you can research
they can research

V-ing form

I can be researching
you can be researching
he can be researching
we can be researching
you can be researching
they can be researching

Perfect

I can have researched
you can have researched
he can have researched
we can have researched
you can have researched
they can have researched

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

can I research?
can you research?
can he research?
can we research?
can you research?
can they research?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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