must squeal
Regular verb: squeal - squealed- squealed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must squeal
you must squeal
she must squeal
we must squeal
you must squeal
they must squeal 	I must be squealing
you must be squealing
she must be squealing
we must be squealing
you must be squealing
they must be squealing	I must have squealed
you must have squealed
she must have squealed
we must have squealed
you must have squealed
they must have squealed	I must have been squealing
you must have been squealing
she must have been squealing
we must have been squealing
you must have been squealing
they must have been squealing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't squeal
you mustn't squeal
she mustn't squeal
we mustn't squeal
you mustn't squeal
they mustn't squeal 	I mustn't be squealing
you mustn't be squealing
she mustn't be squealing
we mustn't be squealing
you mustn't be squealing
they mustn't be squealing	I mustn't have squealed
you mustn't have squealed
she mustn't have squealed
we mustn't have squealed
you mustn't have squealed
they mustn't have squealed	I mustn't have been squealing
you mustn't have been squealing
she mustn't have been squealing
we mustn't have been squealing
you mustn't have been squealing
they mustn't have been squealing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I squeal?
must you squeal?
must she squeal?
must we squeal?
must you squeal?
must they squeal? 	must I be squealing?
must you be squealing?
must she be squealing?
must we be squealing?
must you be squealing?
must they be squealing? 	must I have squealed?
must you have squealed?
must she have squealed?
must we have squealed?
must you have squealed?
must they have squealed? 	must I have been squealing?
must you have been squealing?
must she have been squealing?
must we have been squealing?
must you have been squealing?
must they have been squealing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I squeal?
mustn't you squeal?
mustn't she squeal?
mustn't we squeal?
mustn't you squeal?
mustn't they squeal? 	mustn't I be squealing?
mustn't you be squealing?
mustn't she be squealing?
mustn't we be squealing?
mustn't you be squealing?
mustn't they be squealing? 	mustn't I have squealed?
mustn't you have squealed?
mustn't she have squealed?
mustn't we have squealed?
mustn't you have squealed?
mustn't they have squealed? 	mustn't I have been squealing?
mustn't you have been squealing?
mustn't she have been squealing?
mustn't we have been squealing?
mustn't you have been squealing?
mustn't they have been squealing?