English verb conjugation COULD CURVE

Regular verb: curve - curved - curved

Affirmation

Simple form

I could curve
you could curve
he could curve
we could curve
you could curve
they could curve

V-ing form

I could be curving
you could be curving
he could be curving
we could be curving
you could be curving
they could be curving

Perfect

I could have curved
you could have curved
he could have curved
we could have curved
you could have curved
they could have curved

V-ing perfect

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

Negation

Simple form

I could not curve
you could not curve
he could not curve
we could not curve
you could not curve
they could not curve

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I curve?
could you curve?
could he curve?
could we curve?
could you curve?
could they curve?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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