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 could not mine
you could not mine
he could not mine
we could not mine
you could not mine
they could not mine 	I could not be mining
you could not be mining
he could not be mining
we could not be mining
you could not be mining
they could not be mining	I could not have mined
you could not have mined
he could not have mined
we could not have mined
you could not have mined
they could not have mined	I could not have been mining
you could not have been mining
he could not have been mining
we could not have been mining
you could not have been mining
they could not 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 	
could I not mine?
could you not mine?
could he not mine?
could we not mine?
could you not mine?
could they not mine? 	could I not be mining?
could you not be mining?
could he not be mining?
could we not be mining?
could you not be mining?
could they not be mining? 	could I not have mined?
could you not have mined?
could he not have mined?
could we not have mined?
could you not have mined?
could they not have mined? 	could I not have been mining?
could you not have been mining?
could he not have been mining?
could we not have been mining?
could you not have been mining?
could they not have been mining?