could fix
Regular verb: fix - fixed- fixed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fix
you could fix
she could fix
we could fix
you could fix
they could fix 	I could be fixing
you could be fixing
she could be fixing
we could be fixing
you could be fixing
they could be fixing	I could have fixed
you could have fixed
she could have fixed
we could have fixed
you could have fixed
they could have fixed	I could have been fixing
you could have been fixing
she could have been fixing
we could have been fixing
you could have been fixing
they could have been fixing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fix
you couldn't fix
she couldn't fix
we couldn't fix
you couldn't fix
they couldn't fix 	I couldn't be fixing
you couldn't be fixing
she couldn't be fixing
we couldn't be fixing
you couldn't be fixing
they couldn't be fixing	I couldn't have fixed
you couldn't have fixed
she couldn't have fixed
we couldn't have fixed
you couldn't have fixed
they couldn't have fixed	I couldn't have been fixing
you couldn't have been fixing
she couldn't have been fixing
we couldn't have been fixing
you couldn't have been fixing
they couldn't have been fixing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fix?
could you fix?
could she fix?
could we fix?
could you fix?
could they fix? 	could I be fixing?
could you be fixing?
could she be fixing?
could we be fixing?
could you be fixing?
could they be fixing? 	could I have fixed?
could you have fixed?
could she have fixed?
could we have fixed?
could you have fixed?
could they have fixed? 	could I have been fixing?
could you have been fixing?
could she have been fixing?
could we have been fixing?
could you have been fixing?
could they have been fixing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fix?
couldn't you fix?
couldn't she fix?
couldn't we fix?
couldn't you fix?
couldn't they fix? 	couldn't I be fixing?
couldn't you be fixing?
couldn't she be fixing?
couldn't we be fixing?
couldn't you be fixing?
couldn't they be fixing? 	couldn't I have fixed?
couldn't you have fixed?
couldn't she have fixed?
couldn't we have fixed?
couldn't you have fixed?
couldn't they have fixed? 	couldn't I have been fixing?
couldn't you have been fixing?
couldn't she have been fixing?
couldn't we have been fixing?
couldn't you have been fixing?
couldn't they have been fixing?