could lose
Irregular verb: lose - lost- lost

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could lose
you could lose
he could lose
we could lose
you could lose
they could lose 	I could be losing
you could be losing
he could be losing
we could be losing
you could be losing
they could be losing	I could have lost
you could have lost
he could have lost
we could have lost
you could have lost
they could have lost	I could have been losing
you could have been losing
he could have been losing
we could have been losing
you could have been losing
they could have been losing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not lose
you could not lose
he could not lose
we could not lose
you could not lose
they could not lose 	I could not be losing
you could not be losing
he could not be losing
we could not be losing
you could not be losing
they could not be losing	I could not have lost
you could not have lost
he could not have lost
we could not have lost
you could not have lost
they could not have lost	I could not have been losing
you could not have been losing
he could not have been losing
we could not have been losing
you could not have been losing
they could not have been losing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I lose?
could you lose?
could he lose?
could we lose?
could you lose?
could they lose? 	could I be losing?
could you be losing?
could he be losing?
could we be losing?
could you be losing?
could they be losing? 	could I have lost?
could you have lost?
could he have lost?
could we have lost?
could you have lost?
could they have lost? 	could I have been losing?
could you have been losing?
could he have been losing?
could we have been losing?
could you have been losing?
could they have been losing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not lose?
could you not lose?
could he not lose?
could we not lose?
could you not lose?
could they not lose? 	could I not be losing?
could you not be losing?
could he not be losing?
could we not be losing?
could you not be losing?
could they not be losing? 	could I not have lost?
could you not have lost?
could he not have lost?
could we not have lost?
could you not have lost?
could they not have lost? 	could I not have been losing?
could you not have been losing?
could he not have been losing?
could we not have been losing?
could you not have been losing?
could they not have been losing?