must unscramble
Regular verb: unscramble - unscrambled- unscrambled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unscramble
you must unscramble
she must unscramble
we must unscramble
you must unscramble
they must unscramble 	I must be unscrambling
you must be unscrambling
she must be unscrambling
we must be unscrambling
you must be unscrambling
they must be unscrambling	I must have unscrambled
you must have unscrambled
she must have unscrambled
we must have unscrambled
you must have unscrambled
they must have unscrambled	I must have been unscrambling
you must have been unscrambling
she must have been unscrambling
we must have been unscrambling
you must have been unscrambling
they must have been unscrambling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unscramble
you mustn't unscramble
she mustn't unscramble
we mustn't unscramble
you mustn't unscramble
they mustn't unscramble 	I mustn't be unscrambling
you mustn't be unscrambling
she mustn't be unscrambling
we mustn't be unscrambling
you mustn't be unscrambling
they mustn't be unscrambling	I mustn't have unscrambled
you mustn't have unscrambled
she mustn't have unscrambled
we mustn't have unscrambled
you mustn't have unscrambled
they mustn't have unscrambled	I mustn't have been unscrambling
you mustn't have been unscrambling
she mustn't have been unscrambling
we mustn't have been unscrambling
you mustn't have been unscrambling
they mustn't have been unscrambling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unscramble?
must you unscramble?
must she unscramble?
must we unscramble?
must you unscramble?
must they unscramble? 	must I be unscrambling?
must you be unscrambling?
must she be unscrambling?
must we be unscrambling?
must you be unscrambling?
must they be unscrambling? 	must I have unscrambled?
must you have unscrambled?
must she have unscrambled?
must we have unscrambled?
must you have unscrambled?
must they have unscrambled? 	must I have been unscrambling?
must you have been unscrambling?
must she have been unscrambling?
must we have been unscrambling?
must you have been unscrambling?
must they have been unscrambling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unscramble?
mustn't you unscramble?
mustn't she unscramble?
mustn't we unscramble?
mustn't you unscramble?
mustn't they unscramble? 	mustn't I be unscrambling?
mustn't you be unscrambling?
mustn't she be unscrambling?
mustn't we be unscrambling?
mustn't you be unscrambling?
mustn't they be unscrambling? 	mustn't I have unscrambled?
mustn't you have unscrambled?
mustn't she have unscrambled?
mustn't we have unscrambled?
mustn't you have unscrambled?
mustn't they have unscrambled? 	mustn't I have been unscrambling?
mustn't you have been unscrambling?
mustn't she have been unscrambling?
mustn't we have been unscrambling?
mustn't you have been unscrambling?
mustn't they have been unscrambling?