could outdo
Irregular verb: outdo - outdid- outdone

Affirmation 	
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I could outdo
you could outdo
he could outdo
we could outdo
you could outdo
they could outdo 	I could be outdoing
you could be outdoing
he could be outdoing
we could be outdoing
you could be outdoing
they could be outdoing	I could have outdone
you could have outdone
he could have outdone
we could have outdone
you could have outdone
they could have outdone	I could have been outdoing
you could have been outdoing
he could have been outdoing
we could have been outdoing
you could have been outdoing
they could have been outdoing	

Negation 	
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I couldn't outdo
you couldn't outdo
he couldn't outdo
we couldn't outdo
you couldn't outdo
they couldn't outdo 	I couldn't be outdoing
you couldn't be outdoing
he couldn't be outdoing
we couldn't be outdoing
you couldn't be outdoing
they couldn't be outdoing	I couldn't have outdone
you couldn't have outdone
he couldn't have outdone
we couldn't have outdone
you couldn't have outdone
they couldn't have outdone	I couldn't have been outdoing
you couldn't have been outdoing
he couldn't have been outdoing
we couldn't have been outdoing
you couldn't have been outdoing
they couldn't have been outdoing	

Interrogative form 	
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could I outdo?
could you outdo?
could he outdo?
could we outdo?
could you outdo?
could they outdo? 	could I be outdoing?
could you be outdoing?
could he be outdoing?
could we be outdoing?
could you be outdoing?
could they be outdoing? 	could I have outdone?
could you have outdone?
could he have outdone?
could we have outdone?
could you have outdone?
could they have outdone? 	could I have been outdoing?
could you have been outdoing?
could he have been outdoing?
could we have been outdoing?
could you have been outdoing?
could they have been outdoing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I outdo?
couldn't you outdo?
couldn't he outdo?
couldn't we outdo?
couldn't you outdo?
couldn't they outdo? 	couldn't I be outdoing?
couldn't you be outdoing?
couldn't he be outdoing?
couldn't we be outdoing?
couldn't you be outdoing?
couldn't they be outdoing? 	couldn't I have outdone?
couldn't you have outdone?
couldn't he have outdone?
couldn't we have outdone?
couldn't you have outdone?
couldn't they have outdone? 	couldn't I have been outdoing?
couldn't you have been outdoing?
couldn't he have been outdoing?
couldn't we have been outdoing?
couldn't you have been outdoing?
couldn't they have been outdoing?