must thaw
Regular verb: thaw - thawed- thawed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must thaw
you must thaw
he must thaw
we must thaw
you must thaw
they must thaw 	I must be thawing
you must be thawing
he must be thawing
we must be thawing
you must be thawing
they must be thawing	I must have thawed
you must have thawed
he must have thawed
we must have thawed
you must have thawed
they must have thawed	I must have been thawing
you must have been thawing
he must have been thawing
we must have been thawing
you must have been thawing
they must have been thawing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't thaw
you mustn't thaw
he mustn't thaw
we mustn't thaw
you mustn't thaw
they mustn't thaw 	I mustn't be thawing
you mustn't be thawing
he mustn't be thawing
we mustn't be thawing
you mustn't be thawing
they mustn't be thawing	I mustn't have thawed
you mustn't have thawed
he mustn't have thawed
we mustn't have thawed
you mustn't have thawed
they mustn't have thawed	I mustn't have been thawing
you mustn't have been thawing
he mustn't have been thawing
we mustn't have been thawing
you mustn't have been thawing
they mustn't have been thawing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I thaw?
must you thaw?
must he thaw?
must we thaw?
must you thaw?
must they thaw? 	must I be thawing?
must you be thawing?
must he be thawing?
must we be thawing?
must you be thawing?
must they be thawing? 	must I have thawed?
must you have thawed?
must he have thawed?
must we have thawed?
must you have thawed?
must they have thawed? 	must I have been thawing?
must you have been thawing?
must he have been thawing?
must we have been thawing?
must you have been thawing?
must they have been thawing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I thaw?
mustn't you thaw?
mustn't he thaw?
mustn't we thaw?
mustn't you thaw?
mustn't they thaw? 	mustn't I be thawing?
mustn't you be thawing?
mustn't he be thawing?
mustn't we be thawing?
mustn't you be thawing?
mustn't they be thawing? 	mustn't I have thawed?
mustn't you have thawed?
mustn't he have thawed?
mustn't we have thawed?
mustn't you have thawed?
mustn't they have thawed? 	mustn't I have been thawing?
mustn't you have been thawing?
mustn't he have been thawing?
mustn't we have been thawing?
mustn't you have been thawing?
mustn't they have been thawing?