must slub
Regular verb: slub - slubed- slubed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must slub
you must slub
she must slub
we must slub
you must slub
they must slub 	I must be slubing
you must be slubing
she must be slubing
we must be slubing
you must be slubing
they must be slubing	I must have slubed
you must have slubed
she must have slubed
we must have slubed
you must have slubed
they must have slubed	I must have been slubing
you must have been slubing
she must have been slubing
we must have been slubing
you must have been slubing
they must have been slubing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't slub
you mustn't slub
she mustn't slub
we mustn't slub
you mustn't slub
they mustn't slub 	I mustn't be slubing
you mustn't be slubing
she mustn't be slubing
we mustn't be slubing
you mustn't be slubing
they mustn't be slubing	I mustn't have slubed
you mustn't have slubed
she mustn't have slubed
we mustn't have slubed
you mustn't have slubed
they mustn't have slubed	I mustn't have been slubing
you mustn't have been slubing
she mustn't have been slubing
we mustn't have been slubing
you mustn't have been slubing
they mustn't have been slubing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I slub?
must you slub?
must she slub?
must we slub?
must you slub?
must they slub? 	must I be slubing?
must you be slubing?
must she be slubing?
must we be slubing?
must you be slubing?
must they be slubing? 	must I have slubed?
must you have slubed?
must she have slubed?
must we have slubed?
must you have slubed?
must they have slubed? 	must I have been slubing?
must you have been slubing?
must she have been slubing?
must we have been slubing?
must you have been slubing?
must they have been slubing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I slub?
mustn't you slub?
mustn't she slub?
mustn't we slub?
mustn't you slub?
mustn't they slub? 	mustn't I be slubing?
mustn't you be slubing?
mustn't she be slubing?
mustn't we be slubing?
mustn't you be slubing?
mustn't they be slubing? 	mustn't I have slubed?
mustn't you have slubed?
mustn't she have slubed?
mustn't we have slubed?
mustn't you have slubed?
mustn't they have slubed? 	mustn't I have been slubing?
mustn't you have been slubing?
mustn't she have been slubing?
mustn't we have been slubing?
mustn't you have been slubing?
mustn't they have been slubing?