could loose
Regular verb: loose - loosed- loosed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could loose
you could loose
he could loose
we could loose
you could loose
they could loose 	I could be loosing
you could be loosing
he could be loosing
we could be loosing
you could be loosing
they could be loosing	I could have loosed
you could have loosed
he could have loosed
we could have loosed
you could have loosed
they could have loosed	I could have been loosing
you could have been loosing
he could have been loosing
we could have been loosing
you could have been loosing
they could have been loosing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't loose
you couldn't loose
he couldn't loose
we couldn't loose
you couldn't loose
they couldn't loose 	I couldn't be loosing
you couldn't be loosing
he couldn't be loosing
we couldn't be loosing
you couldn't be loosing
they couldn't be loosing	I couldn't have loosed
you couldn't have loosed
he couldn't have loosed
we couldn't have loosed
you couldn't have loosed
they couldn't have loosed	I couldn't have been loosing
you couldn't have been loosing
he couldn't have been loosing
we couldn't have been loosing
you couldn't have been loosing
they couldn't have been loosing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I loose?
could you loose?
could he loose?
could we loose?
could you loose?
could they loose? 	could I be loosing?
could you be loosing?
could he be loosing?
could we be loosing?
could you be loosing?
could they be loosing? 	could I have loosed?
could you have loosed?
could he have loosed?
could we have loosed?
could you have loosed?
could they have loosed? 	could I have been loosing?
could you have been loosing?
could he have been loosing?
could we have been loosing?
could you have been loosing?
could they have been loosing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I loose?
couldn't you loose?
couldn't he loose?
couldn't we loose?
couldn't you loose?
couldn't they loose? 	couldn't I be loosing?
couldn't you be loosing?
couldn't he be loosing?
couldn't we be loosing?
couldn't you be loosing?
couldn't they be loosing? 	couldn't I have loosed?
couldn't you have loosed?
couldn't he have loosed?
couldn't we have loosed?
couldn't you have loosed?
couldn't they have loosed? 	couldn't I have been loosing?
couldn't you have been loosing?
couldn't he have been loosing?
couldn't we have been loosing?
couldn't you have been loosing?
couldn't they have been loosing?