English verb conjugation COULD GRADE

Regular verb: grade - graded - graded

Affirmation

Simple form

I could grade
you could grade
he could grade
we could grade
you could grade
they could grade

V-ing form

I could be grading
you could be grading
he could be grading
we could be grading
you could be grading
they could be grading

Perfect

I could have graded
you could have graded
he could have graded
we could have graded
you could have graded
they could have graded

V-ing perfect

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

Negation

Simple form

I could not grade
you could not grade
he could not grade
we could not grade
you could not grade
they could not grade

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I grade?
could you grade?
could he grade?
could we grade?
could you grade?
could they grade?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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