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 couldn't yard you couldn't yard he couldn't yard we couldn't yard you couldn't yard they couldn't yard	I couldn't be yarding you couldn't be yarding he couldn't be yarding we couldn't be yarding you couldn't be yarding they couldn't be yarding
Perfect	V-ing perfect
I couldn't have yarded you couldn't have yarded he couldn't have yarded we couldn't have yarded you couldn't have yarded they couldn't have yarded	I couldn't have been yarding you couldn't have been yarding he couldn't have been yarding we couldn't have been yarding you couldn't have been yarding they couldn't 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
couldn't I yard? couldn't you yard? couldn't he yard? couldn't we yard? couldn't you yard? couldn't they yard?	couldn't I be yarding? couldn't you be yarding? couldn't he be yarding? couldn't we be yarding? couldn't you be yarding? couldn't they be yarding?
Perfect	V-ing perfect
couldn't I have yarded? couldn't you have yarded? couldn't he have yarded? couldn't we have yarded? couldn't you have yarded? couldn't they have yarded?	couldn't I have been yarding? couldn't you have been yarding? couldn't he have been yarding? couldn't we have been yarding? couldn't you have been yarding? couldn't they have been yarding?