English verb conjugation COULD UPEND

Regular verb: upend - upended - upended

Affirmation

Simple form

I could upend
you could upend
she could upend
we could upend
you could upend
they could upend

V-ing form

I could be upending
you could be upending
she could be upending
we could be upending
you could be upending
they could be upending

Perfect

I could have upended
you could have upended
she could have upended
we could have upended
you could have upended
they could have upended

V-ing perfect

I could have been upending
you could have been upending
she could have been upending
we could have been upending
you could have been upending
they could have been upending

Negation

Simple form

I could not upend
you could not upend
she could not upend
we could not upend
you could not upend
they could not upend

V-ing form

I could not be upending
you could not be upending
she could not be upending
we could not be upending
you could not be upending
they could not be upending

Perfect

I could not have upended
you could not have upended
she could not have upended
we could not have upended
you could not have upended
they could not have upended

V-ing perfect

I could not have been upending
you could not have been upending
she could not have been upending
we could not have been upending
you could not have been upending
they could not have been upending

Interrogative form

Simple form

could I upend?
could you upend?
could she upend?
could we upend?
could you upend?
could they upend?

V-ing form

could I be upending?
could you be upending?
could she be upending?
could we be upending?
could you be upending?
could they be upending?

Perfect

could I have upended?
could you have upended?
could she have upended?
could we have upended?
could you have upended?
could they have upended?

V-ing perfect

could I have been upending?
could you have been upending?
could she have been upending?
could we have been upending?
could you have been upending?
could they have been upending?

Interro-negative form

Simple form

could I not upend?
could you not upend?
could she not upend?
could we not upend?
could you not upend?
could they not upend?

V-ing form

could I not be upending?
could you not be upending?
could she not be upending?
could we not be upending?
could you not be upending?
could they not be upending?

Perfect

could I not have upended?
could you not have upended?
could she not have upended?
could we not have upended?
could you not have upended?
could they not have upended?

V-ing perfect

could I not have been upending?
could you not have been upending?
could she not have been upending?
could we not have been upending?
could you not have been upending?
could they not have been upending?

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