must tongue
Regular verb: tongue - tongued- tongued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must tongue
you must tongue
she must tongue
we must tongue
you must tongue
they must tongue 	I must be tonguing
you must be tonguing
she must be tonguing
we must be tonguing
you must be tonguing
they must be tonguing	I must have tongued
you must have tongued
she must have tongued
we must have tongued
you must have tongued
they must have tongued	I must have been tonguing
you must have been tonguing
she must have been tonguing
we must have been tonguing
you must have been tonguing
they must have been tonguing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't tongue
you mustn't tongue
she mustn't tongue
we mustn't tongue
you mustn't tongue
they mustn't tongue 	I mustn't be tonguing
you mustn't be tonguing
she mustn't be tonguing
we mustn't be tonguing
you mustn't be tonguing
they mustn't be tonguing	I mustn't have tongued
you mustn't have tongued
she mustn't have tongued
we mustn't have tongued
you mustn't have tongued
they mustn't have tongued	I mustn't have been tonguing
you mustn't have been tonguing
she mustn't have been tonguing
we mustn't have been tonguing
you mustn't have been tonguing
they mustn't have been tonguing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I tongue?
must you tongue?
must she tongue?
must we tongue?
must you tongue?
must they tongue? 	must I be tonguing?
must you be tonguing?
must she be tonguing?
must we be tonguing?
must you be tonguing?
must they be tonguing? 	must I have tongued?
must you have tongued?
must she have tongued?
must we have tongued?
must you have tongued?
must they have tongued? 	must I have been tonguing?
must you have been tonguing?
must she have been tonguing?
must we have been tonguing?
must you have been tonguing?
must they have been tonguing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I tongue?
mustn't you tongue?
mustn't she tongue?
mustn't we tongue?
mustn't you tongue?
mustn't they tongue? 	mustn't I be tonguing?
mustn't you be tonguing?
mustn't she be tonguing?
mustn't we be tonguing?
mustn't you be tonguing?
mustn't they be tonguing? 	mustn't I have tongued?
mustn't you have tongued?
mustn't she have tongued?
mustn't we have tongued?
mustn't you have tongued?
mustn't they have tongued? 	mustn't I have been tonguing?
mustn't you have been tonguing?
mustn't she have been tonguing?
mustn't we have been tonguing?
mustn't you have been tonguing?
mustn't they have been tonguing?