must smack
Regular verb: smack - smacked- smacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must smack
you must smack
he must smack
we must smack
you must smack
they must smack 	I must be smacking
you must be smacking
he must be smacking
we must be smacking
you must be smacking
they must be smacking	I must have smacked
you must have smacked
he must have smacked
we must have smacked
you must have smacked
they must have smacked	I must have been smacking
you must have been smacking
he must have been smacking
we must have been smacking
you must have been smacking
they must have been smacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not smack
you must not smack
he must not smack
we must not smack
you must not smack
they must not smack 	I must not be smacking
you must not be smacking
he must not be smacking
we must not be smacking
you must not be smacking
they must not be smacking	I must not have smacked
you must not have smacked
he must not have smacked
we must not have smacked
you must not have smacked
they must not have smacked	I must not have been smacking
you must not have been smacking
he must not have been smacking
we must not have been smacking
you must not have been smacking
they must not have been smacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I smack?
must you smack?
must he smack?
must we smack?
must you smack?
must they smack? 	must I be smacking?
must you be smacking?
must he be smacking?
must we be smacking?
must you be smacking?
must they be smacking? 	must I have smacked?
must you have smacked?
must he have smacked?
must we have smacked?
must you have smacked?
must they have smacked? 	must I have been smacking?
must you have been smacking?
must he have been smacking?
must we have been smacking?
must you have been smacking?
must they have been smacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not smack?
must you not smack?
must he not smack?
must we not smack?
must you not smack?
must they not smack? 	must I not be smacking?
must you not be smacking?
must he not be smacking?
must we not be smacking?
must you not be smacking?
must they not be smacking? 	must I not have smacked?
must you not have smacked?
must he not have smacked?
must we not have smacked?
must you not have smacked?
must they not have smacked? 	must I not have been smacking?
must you not have been smacking?
must he not have been smacking?
must we not have been smacking?
must you not have been smacking?
must they not have been smacking?