could enlarge
Regular verb: enlarge - enlarged- enlarged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could enlarge
you could enlarge
she could enlarge
we could enlarge
you could enlarge
they could enlarge 	I could be enlarging
you could be enlarging
she could be enlarging
we could be enlarging
you could be enlarging
they could be enlarging	I could have enlarged
you could have enlarged
she could have enlarged
we could have enlarged
you could have enlarged
they could have enlarged	I could have been enlarging
you could have been enlarging
she could have been enlarging
we could have been enlarging
you could have been enlarging
they could have been enlarging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't enlarge
you couldn't enlarge
she couldn't enlarge
we couldn't enlarge
you couldn't enlarge
they couldn't enlarge 	I couldn't be enlarging
you couldn't be enlarging
she couldn't be enlarging
we couldn't be enlarging
you couldn't be enlarging
they couldn't be enlarging	I couldn't have enlarged
you couldn't have enlarged
she couldn't have enlarged
we couldn't have enlarged
you couldn't have enlarged
they couldn't have enlarged	I couldn't have been enlarging
you couldn't have been enlarging
she couldn't have been enlarging
we couldn't have been enlarging
you couldn't have been enlarging
they couldn't have been enlarging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I enlarge?
could you enlarge?
could she enlarge?
could we enlarge?
could you enlarge?
could they enlarge? 	could I be enlarging?
could you be enlarging?
could she be enlarging?
could we be enlarging?
could you be enlarging?
could they be enlarging? 	could I have enlarged?
could you have enlarged?
could she have enlarged?
could we have enlarged?
could you have enlarged?
could they have enlarged? 	could I have been enlarging?
could you have been enlarging?
could she have been enlarging?
could we have been enlarging?
could you have been enlarging?
could they have been enlarging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I enlarge?
couldn't you enlarge?
couldn't she enlarge?
couldn't we enlarge?
couldn't you enlarge?
couldn't they enlarge? 	couldn't I be enlarging?
couldn't you be enlarging?
couldn't she be enlarging?
couldn't we be enlarging?
couldn't you be enlarging?
couldn't they be enlarging? 	couldn't I have enlarged?
couldn't you have enlarged?
couldn't she have enlarged?
couldn't we have enlarged?
couldn't you have enlarged?
couldn't they have enlarged? 	couldn't I have been enlarging?
couldn't you have been enlarging?
couldn't she have been enlarging?
couldn't we have been enlarging?
couldn't you have been enlarging?
couldn't they have been enlarging?