English verb conjugation COULD YAP

Regular verb: yap - yapped - yapped

Affirmation

Simple form

I could yap
you could yap
he could yap
we could yap
you could yap
they could yap

V-ing form

I could be yapping
you could be yapping
he could be yapping
we could be yapping
you could be yapping
they could be yapping

Perfect

I could have yapped
you could have yapped
he could have yapped
we could have yapped
you could have yapped
they could have yapped

V-ing perfect

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

Negation

Simple form

I couldn't yap
you couldn't yap
he couldn't yap
we couldn't yap
you couldn't yap
they couldn't yap

V-ing form

I couldn't be yapping
you couldn't be yapping
he couldn't be yapping
we couldn't be yapping
you couldn't be yapping
they couldn't be yapping

Perfect

I couldn't have yapped
you couldn't have yapped
he couldn't have yapped
we couldn't have yapped
you couldn't have yapped
they couldn't have yapped

V-ing perfect

I couldn't have been yapping
you couldn't have been yapping
he couldn't have been yapping
we couldn't have been yapping
you couldn't have been yapping
they couldn't have been yapping

Interrogative form

Simple form

could I yap?
could you yap?
could he yap?
could we yap?
could you yap?
could they yap?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

couldn't I yap?
couldn't you yap?
couldn't he yap?
couldn't we yap?
couldn't you yap?
couldn't they yap?

V-ing form

couldn't I be yapping?
couldn't you be yapping?
couldn't he be yapping?
couldn't we be yapping?
couldn't you be yapping?
couldn't they be yapping?

Perfect

couldn't I have yapped?
couldn't you have yapped?
couldn't he have yapped?
couldn't we have yapped?
couldn't you have yapped?
couldn't they have yapped?

V-ing perfect

couldn't I have been yapping?
couldn't you have been yapping?
couldn't he have been yapping?
couldn't we have been yapping?
couldn't you have been yapping?
couldn't they have been yapping?

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