could database
Regular verb: database - databased- databased

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could database
you could database
she could database
we could database
you could database
they could database 	I could be databasing
you could be databasing
she could be databasing
we could be databasing
you could be databasing
they could be databasing	I could have databased
you could have databased
she could have databased
we could have databased
you could have databased
they could have databased	I could have been databasing
you could have been databasing
she could have been databasing
we could have been databasing
you could have been databasing
they could have been databasing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't database
you couldn't database
she couldn't database
we couldn't database
you couldn't database
they couldn't database 	I couldn't be databasing
you couldn't be databasing
she couldn't be databasing
we couldn't be databasing
you couldn't be databasing
they couldn't be databasing	I couldn't have databased
you couldn't have databased
she couldn't have databased
we couldn't have databased
you couldn't have databased
they couldn't have databased	I couldn't have been databasing
you couldn't have been databasing
she couldn't have been databasing
we couldn't have been databasing
you couldn't have been databasing
they couldn't have been databasing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I database?
could you database?
could she database?
could we database?
could you database?
could they database? 	could I be databasing?
could you be databasing?
could she be databasing?
could we be databasing?
could you be databasing?
could they be databasing? 	could I have databased?
could you have databased?
could she have databased?
could we have databased?
could you have databased?
could they have databased? 	could I have been databasing?
could you have been databasing?
could she have been databasing?
could we have been databasing?
could you have been databasing?
could they have been databasing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I database?
couldn't you database?
couldn't she database?
couldn't we database?
couldn't you database?
couldn't they database? 	couldn't I be databasing?
couldn't you be databasing?
couldn't she be databasing?
couldn't we be databasing?
couldn't you be databasing?
couldn't they be databasing? 	couldn't I have databased?
couldn't you have databased?
couldn't she have databased?
couldn't we have databased?
couldn't you have databased?
couldn't they have databased? 	couldn't I have been databasing?
couldn't you have been databasing?
couldn't she have been databasing?
couldn't we have been databasing?
couldn't you have been databasing?
couldn't they have been databasing?