could mine
Regular verb: mine - mined- mined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could mine
you could mine
he could mine
we could mine
you could mine
they could mine 	I could be mining
you could be mining
he could be mining
we could be mining
you could be mining
they could be mining	I could have mined
you could have mined
he could have mined
we could have mined
you could have mined
they could have mined	I could have been mining
you could have been mining
he could have been mining
we could have been mining
you could have been mining
they could have been mining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't mine
you couldn't mine
he couldn't mine
we couldn't mine
you couldn't mine
they couldn't mine 	I couldn't be mining
you couldn't be mining
he couldn't be mining
we couldn't be mining
you couldn't be mining
they couldn't be mining	I couldn't have mined
you couldn't have mined
he couldn't have mined
we couldn't have mined
you couldn't have mined
they couldn't have mined	I couldn't have been mining
you couldn't have been mining
he couldn't have been mining
we couldn't have been mining
you couldn't have been mining
they couldn't have been mining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I mine?
could you mine?
could he mine?
could we mine?
could you mine?
could they mine? 	could I be mining?
could you be mining?
could he be mining?
could we be mining?
could you be mining?
could they be mining? 	could I have mined?
could you have mined?
could he have mined?
could we have mined?
could you have mined?
could they have mined? 	could I have been mining?
could you have been mining?
could he have been mining?
could we have been mining?
could you have been mining?
could they have been mining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I mine?
couldn't you mine?
couldn't he mine?
couldn't we mine?
couldn't you mine?
couldn't they mine? 	couldn't I be mining?
couldn't you be mining?
couldn't he be mining?
couldn't we be mining?
couldn't you be mining?
couldn't they be mining? 	couldn't I have mined?
couldn't you have mined?
couldn't he have mined?
couldn't we have mined?
couldn't you have mined?
couldn't they have mined? 	couldn't I have been mining?
couldn't you have been mining?
couldn't he have been mining?
couldn't we have been mining?
couldn't you have been mining?
couldn't they have been mining?