could dinner dinner
Regular verb: dinner dinner - dinner dinnered- dinner dinnered

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dinner dinner
you could dinner dinner
she could dinner dinner
we could dinner dinner
you could dinner dinner
they could dinner dinner 	I could be dinner dinnering
you could be dinner dinnering
she could be dinner dinnering
we could be dinner dinnering
you could be dinner dinnering
they could be dinner dinnering	I could have dinner dinnered
you could have dinner dinnered
she could have dinner dinnered
we could have dinner dinnered
you could have dinner dinnered
they could have dinner dinnered	I could have been dinner dinnering
you could have been dinner dinnering
she could have been dinner dinnering
we could have been dinner dinnering
you could have been dinner dinnering
they could have been dinner dinnering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't dinner dinner
you couldn't dinner dinner
she couldn't dinner dinner
we couldn't dinner dinner
you couldn't dinner dinner
they couldn't dinner dinner 	I couldn't be dinner dinnering
you couldn't be dinner dinnering
she couldn't be dinner dinnering
we couldn't be dinner dinnering
you couldn't be dinner dinnering
they couldn't be dinner dinnering	I couldn't have dinner dinnered
you couldn't have dinner dinnered
she couldn't have dinner dinnered
we couldn't have dinner dinnered
you couldn't have dinner dinnered
they couldn't have dinner dinnered	I couldn't have been dinner dinnering
you couldn't have been dinner dinnering
she couldn't have been dinner dinnering
we couldn't have been dinner dinnering
you couldn't have been dinner dinnering
they couldn't have been dinner dinnering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dinner dinner?
could you dinner dinner?
could she dinner dinner?
could we dinner dinner?
could you dinner dinner?
could they dinner dinner? 	could I be dinner dinnering?
could you be dinner dinnering?
could she be dinner dinnering?
could we be dinner dinnering?
could you be dinner dinnering?
could they be dinner dinnering? 	could I have dinner dinnered?
could you have dinner dinnered?
could she have dinner dinnered?
could we have dinner dinnered?
could you have dinner dinnered?
could they have dinner dinnered? 	could I have been dinner dinnering?
could you have been dinner dinnering?
could she have been dinner dinnering?
could we have been dinner dinnering?
could you have been dinner dinnering?
could they have been dinner dinnering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I dinner dinner?
couldn't you dinner dinner?
couldn't she dinner dinner?
couldn't we dinner dinner?
couldn't you dinner dinner?
couldn't they dinner dinner? 	couldn't I be dinner dinnering?
couldn't you be dinner dinnering?
couldn't she be dinner dinnering?
couldn't we be dinner dinnering?
couldn't you be dinner dinnering?
couldn't they be dinner dinnering? 	couldn't I have dinner dinnered?
couldn't you have dinner dinnered?
couldn't she have dinner dinnered?
couldn't we have dinner dinnered?
couldn't you have dinner dinnered?
couldn't they have dinner dinnered? 	couldn't I have been dinner dinnering?
couldn't you have been dinner dinnering?
couldn't she have been dinner dinnering?
couldn't we have been dinner dinnering?
couldn't you have been dinner dinnering?
couldn't they have been dinner dinnering?