English verb conjugation
COULD DATABASE

Regular verb: database - databased - databased

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?