English verb conjugation COULD STUDY

Regular verb: study - studied - studied

Affirmation

Simple form

I could study
you could study
he could study
we could study
you could study
they could study

V-ing form

I could be studying
you could be studying
he could be studying
we could be studying
you could be studying
they could be studying

Perfect

I could have studied
you could have studied
he could have studied
we could have studied
you could have studied
they could have studied

V-ing perfect

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

Negation

Simple form

I could not study
you could not study
he could not study
we could not study
you could not study
they could not study

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I study?
could you study?
could he study?
could we study?
could you study?
could they study?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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