could yard
Regular verb: yard - yarded- yarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could yard
you could yard
she could yard
we could yard
you could yard
they could yard 	I could be yarding
you could be yarding
she could be yarding
we could be yarding
you could be yarding
they could be yarding	I could have yarded
you could have yarded
she 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
she 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 	Perfect 	V-ing perfect 	
I couldn't yard
you couldn't yard
she 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
she couldn't be yarding
we couldn't be yarding
you couldn't be yarding
they couldn't be yarding	I couldn't have yarded
you couldn't have yarded
she 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
she 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 	Perfect 	V-ing perfect 	
could I yard?
could you yard?
could she yard?
could we yard?
could you yard?
could they yard? 	could I be yarding?
could you be yarding?
could she be yarding?
could we be yarding?
could you be yarding?
could they be yarding? 	could I have yarded?
could you have yarded?
could she 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 she 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 	Perfect 	V-ing perfect 	
couldn't I yard?
couldn't you yard?
couldn't she 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 she be yarding?
couldn't we be yarding?
couldn't you be yarding?
couldn't they be yarding? 	couldn't I have yarded?
couldn't you have yarded?
couldn't she 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 she have been yarding?
couldn't we have been yarding?
couldn't you have been yarding?
couldn't they have been yarding?