could outyield
Regular verb: outyield - outyielded- outyielded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could outyield
you could outyield
he could outyield
we could outyield
you could outyield
they could outyield 	I could be outyielding
you could be outyielding
he could be outyielding
we could be outyielding
you could be outyielding
they could be outyielding	I could have outyielded
you could have outyielded
he could have outyielded
we could have outyielded
you could have outyielded
they could have outyielded	I could have been outyielding
you could have been outyielding
he could have been outyielding
we could have been outyielding
you could have been outyielding
they could have been outyielding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't outyield
you couldn't outyield
he couldn't outyield
we couldn't outyield
you couldn't outyield
they couldn't outyield 	I couldn't be outyielding
you couldn't be outyielding
he couldn't be outyielding
we couldn't be outyielding
you couldn't be outyielding
they couldn't be outyielding	I couldn't have outyielded
you couldn't have outyielded
he couldn't have outyielded
we couldn't have outyielded
you couldn't have outyielded
they couldn't have outyielded	I couldn't have been outyielding
you couldn't have been outyielding
he couldn't have been outyielding
we couldn't have been outyielding
you couldn't have been outyielding
they couldn't have been outyielding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I outyield?
could you outyield?
could he outyield?
could we outyield?
could you outyield?
could they outyield? 	could I be outyielding?
could you be outyielding?
could he be outyielding?
could we be outyielding?
could you be outyielding?
could they be outyielding? 	could I have outyielded?
could you have outyielded?
could he have outyielded?
could we have outyielded?
could you have outyielded?
could they have outyielded? 	could I have been outyielding?
could you have been outyielding?
could he have been outyielding?
could we have been outyielding?
could you have been outyielding?
could they have been outyielding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I outyield?
couldn't you outyield?
couldn't he outyield?
couldn't we outyield?
couldn't you outyield?
couldn't they outyield? 	couldn't I be outyielding?
couldn't you be outyielding?
couldn't he be outyielding?
couldn't we be outyielding?
couldn't you be outyielding?
couldn't they be outyielding? 	couldn't I have outyielded?
couldn't you have outyielded?
couldn't he have outyielded?
couldn't we have outyielded?
couldn't you have outyielded?
couldn't they have outyielded? 	couldn't I have been outyielding?
couldn't you have been outyielding?
couldn't he have been outyielding?
couldn't we have been outyielding?
couldn't you have been outyielding?
couldn't they have been outyielding?