could zinc
Regular verb: zinc - zinced- zinced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could zinc
you could zinc
he could zinc
we could zinc
you could zinc
they could zinc 	I could be zincing
you could be zincing
he could be zincing
we could be zincing
you could be zincing
they could be zincing	I could have zinced
you could have zinced
he could have zinced
we could have zinced
you could have zinced
they could have zinced	I could have been zincing
you could have been zincing
he could have been zincing
we could have been zincing
you could have been zincing
they could have been zincing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't zinc
you couldn't zinc
he couldn't zinc
we couldn't zinc
you couldn't zinc
they couldn't zinc 	I couldn't be zincing
you couldn't be zincing
he couldn't be zincing
we couldn't be zincing
you couldn't be zincing
they couldn't be zincing	I couldn't have zinced
you couldn't have zinced
he couldn't have zinced
we couldn't have zinced
you couldn't have zinced
they couldn't have zinced	I couldn't have been zincing
you couldn't have been zincing
he couldn't have been zincing
we couldn't have been zincing
you couldn't have been zincing
they couldn't have been zincing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I zinc?
could you zinc?
could he zinc?
could we zinc?
could you zinc?
could they zinc? 	could I be zincing?
could you be zincing?
could he be zincing?
could we be zincing?
could you be zincing?
could they be zincing? 	could I have zinced?
could you have zinced?
could he have zinced?
could we have zinced?
could you have zinced?
could they have zinced? 	could I have been zincing?
could you have been zincing?
could he have been zincing?
could we have been zincing?
could you have been zincing?
could they have been zincing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I zinc?
couldn't you zinc?
couldn't he zinc?
couldn't we zinc?
couldn't you zinc?
couldn't they zinc? 	couldn't I be zincing?
couldn't you be zincing?
couldn't he be zincing?
couldn't we be zincing?
couldn't you be zincing?
couldn't they be zincing? 	couldn't I have zinced?
couldn't you have zinced?
couldn't he have zinced?
couldn't we have zinced?
couldn't you have zinced?
couldn't they have zinced? 	couldn't I have been zincing?
couldn't you have been zincing?
couldn't he have been zincing?
couldn't we have been zincing?
couldn't you have been zincing?
couldn't they have been zincing?