English verb conjugation COULD RESEARCH

Regular verb: research - researched - researched

Affirmation

Simple form

I could research
you could research
he could research
we could research
you could research
they could research

V-ing form

I could be researching
you could be researching
he could be researching
we could be researching
you could be researching
they could be researching

Perfect

I could have researched
you could have researched
he could have researched
we could have researched
you could have researched
they could have researched

V-ing perfect

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

Negation

Simple form

I could not research
you could not research
he could not research
we could not research
you could not research
they could not research

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I research?
could you research?
could he research?
could we research?
could you research?
could they research?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Page top