English verb conjugation COULD YAK

Regular verb: yak - yaked - yaked

Affirmation

Simple form

I could yak
you could yak
he could yak
we could yak
you could yak
they could yak

V-ing form

I could be yaking
you could be yaking
he could be yaking
we could be yaking
you could be yaking
they could be yaking

Perfect

I could have yaked
you could have yaked
he could have yaked
we could have yaked
you could have yaked
they could have yaked

V-ing perfect

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

Negation

Simple form

I could not yak
you could not yak
he could not yak
we could not yak
you could not yak
they could not yak

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I yak?
could you yak?
could he yak?
could we yak?
could you yak?
could they yak?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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