must goggle
Regular verb: goggle - goggled- goggled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must goggle
you must goggle
he must goggle
we must goggle
you must goggle
they must goggle 	I must be goggling
you must be goggling
he must be goggling
we must be goggling
you must be goggling
they must be goggling	I must have goggled
you must have goggled
he must have goggled
we must have goggled
you must have goggled
they must have goggled	I must have been goggling
you must have been goggling
he must have been goggling
we must have been goggling
you must have been goggling
they must have been goggling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't goggle
you mustn't goggle
he mustn't goggle
we mustn't goggle
you mustn't goggle
they mustn't goggle 	I mustn't be goggling
you mustn't be goggling
he mustn't be goggling
we mustn't be goggling
you mustn't be goggling
they mustn't be goggling	I mustn't have goggled
you mustn't have goggled
he mustn't have goggled
we mustn't have goggled
you mustn't have goggled
they mustn't have goggled	I mustn't have been goggling
you mustn't have been goggling
he mustn't have been goggling
we mustn't have been goggling
you mustn't have been goggling
they mustn't have been goggling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I goggle?
must you goggle?
must he goggle?
must we goggle?
must you goggle?
must they goggle? 	must I be goggling?
must you be goggling?
must he be goggling?
must we be goggling?
must you be goggling?
must they be goggling? 	must I have goggled?
must you have goggled?
must he have goggled?
must we have goggled?
must you have goggled?
must they have goggled? 	must I have been goggling?
must you have been goggling?
must he have been goggling?
must we have been goggling?
must you have been goggling?
must they have been goggling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I goggle?
mustn't you goggle?
mustn't he goggle?
mustn't we goggle?
mustn't you goggle?
mustn't they goggle? 	mustn't I be goggling?
mustn't you be goggling?
mustn't he be goggling?
mustn't we be goggling?
mustn't you be goggling?
mustn't they be goggling? 	mustn't I have goggled?
mustn't you have goggled?
mustn't he have goggled?
mustn't we have goggled?
mustn't you have goggled?
mustn't they have goggled? 	mustn't I have been goggling?
mustn't you have been goggling?
mustn't he have been goggling?
mustn't we have been goggling?
mustn't you have been goggling?
mustn't they have been goggling?