English verb conjugation
COULD YARD

Regular verb: yard - yarded - yarded

Affirmation

Simple form	V-ing form
I could yard you could yard he could yard we could yard you could yard they could yard	I could be yarding you could be yarding he could be yarding we could be yarding you could be yarding they could be yarding
Perfect	V-ing perfect
I could have yarded you could have yarded he could have yarded we could have yarded you could have yarded they could have yarded	I could have been yarding you could have been yarding he could have been yarding we could have been yarding you could have been yarding they could have been yarding

Negation

Simple form	V-ing form
I could not yard you could not yard he could not yard we could not yard you could not yard they could not yard	I could not be yarding you could not be yarding he could not be yarding we could not be yarding you could not be yarding they could not be yarding
Perfect	V-ing perfect
I could not have yarded you could not have yarded he could not have yarded we could not have yarded you could not have yarded they could not have yarded	I could not have been yarding you could not have been yarding he could not have been yarding we could not have been yarding you could not have been yarding they could not have been yarding

Interrogative form

Simple form	V-ing form
could I yard? could you yard? could he yard? could we yard? could you yard? could they yard?	could I be yarding? could you be yarding? could he be yarding? could we be yarding? could you be yarding? could they be yarding?
Perfect	V-ing perfect
could I have yarded? could you have yarded? could he have yarded? could we have yarded? could you have yarded? could they have yarded?	could I have been yarding? could you have been yarding? could he have been yarding? could we have been yarding? could you have been yarding? could they have been yarding?

Interro-negative form

Simple form	V-ing form
could I not yard? could you not yard? could he not yard? could we not yard? could you not yard? could they not yard?	could I not be yarding? could you not be yarding? could he not be yarding? could we not be yarding? could you not be yarding? could they not be yarding?
Perfect	V-ing perfect
could I not have yarded? could you not have yarded? could he not have yarded? could we not have yarded? could you not have yarded? could they not have yarded?	could I not have been yarding? could you not have been yarding? could he not have been yarding? could we not have been yarding? could you not have been yarding? could they not have been yarding?