must database
Regular verb: database - databased- databased

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

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

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

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