English verb conjugation COULD YES

Regular verb: yes - yesed - yesed

Affirmation

Simple form

I could yes
you could yes
he could yes
we could yes
you could yes
they could yes

V-ing form

I could be yesing
you could be yesing
he could be yesing
we could be yesing
you could be yesing
they could be yesing

Perfect

I could have yesed
you could have yesed
he could have yesed
we could have yesed
you could have yesed
they could have yesed

V-ing perfect

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

Negation

Simple form

I could not yes
you could not yes
he could not yes
we could not yes
you could not yes
they could not yes

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I yes?
could you yes?
could he yes?
could we yes?
could you yes?
could they yes?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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