must thaw
Regular verb: thaw - thawed- thawed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must thaw
you must thaw
she must thaw
we must thaw
you must thaw
they must thaw 	I must be thawing
you must be thawing
she must be thawing
we must be thawing
you must be thawing
they must be thawing	I must have thawed
you must have thawed
she 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
she 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
she 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
she 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
she 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
she 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 she thaw?
must we thaw?
must you thaw?
must they thaw? 	must I be thawing?
must you be thawing?
must she be thawing?
must we be thawing?
must you be thawing?
must they be thawing? 	must I have thawed?
must you have thawed?
must she 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 she 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 she 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 she 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 she 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 she have been thawing?
mustn't we have been thawing?
mustn't you have been thawing?
mustn't they have been thawing?