must smash
Regular verb: smash - smashed- smashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must smash
you must smash
she must smash
we must smash
you must smash
they must smash 	I must be smashing
you must be smashing
she must be smashing
we must be smashing
you must be smashing
they must be smashing	I must have smashed
you must have smashed
she must have smashed
we must have smashed
you must have smashed
they must have smashed	I must have been smashing
you must have been smashing
she must have been smashing
we must have been smashing
you must have been smashing
they must have been smashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't smash
you mustn't smash
she mustn't smash
we mustn't smash
you mustn't smash
they mustn't smash 	I mustn't be smashing
you mustn't be smashing
she mustn't be smashing
we mustn't be smashing
you mustn't be smashing
they mustn't be smashing	I mustn't have smashed
you mustn't have smashed
she mustn't have smashed
we mustn't have smashed
you mustn't have smashed
they mustn't have smashed	I mustn't have been smashing
you mustn't have been smashing
she mustn't have been smashing
we mustn't have been smashing
you mustn't have been smashing
they mustn't have been smashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I smash?
must you smash?
must she smash?
must we smash?
must you smash?
must they smash? 	must I be smashing?
must you be smashing?
must she be smashing?
must we be smashing?
must you be smashing?
must they be smashing? 	must I have smashed?
must you have smashed?
must she have smashed?
must we have smashed?
must you have smashed?
must they have smashed? 	must I have been smashing?
must you have been smashing?
must she have been smashing?
must we have been smashing?
must you have been smashing?
must they have been smashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I smash?
mustn't you smash?
mustn't she smash?
mustn't we smash?
mustn't you smash?
mustn't they smash? 	mustn't I be smashing?
mustn't you be smashing?
mustn't she be smashing?
mustn't we be smashing?
mustn't you be smashing?
mustn't they be smashing? 	mustn't I have smashed?
mustn't you have smashed?
mustn't she have smashed?
mustn't we have smashed?
mustn't you have smashed?
mustn't they have smashed? 	mustn't I have been smashing?
mustn't you have been smashing?
mustn't she have been smashing?
mustn't we have been smashing?
mustn't you have been smashing?
mustn't they have been smashing?