must tissue
Verbe régulier : tissue - tissued- tissued

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must tissue
you must tissue
he must tissue
we must tissue
you must tissue
they must tissue 	I must be tissuing
you must be tissuing
he must be tissuing
we must be tissuing
you must be tissuing
they must be tissuing	I must have tissued
you must have tissued
he must have tissued
we must have tissued
you must have tissued
they must have tissued	I must have been tissuing
you must have been tissuing
he must have been tissuing
we must have been tissuing
you must have been tissuing
they must have been tissuing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't tissue
you mustn't tissue
he mustn't tissue
we mustn't tissue
you mustn't tissue
they mustn't tissue 	I mustn't be tissuing
you mustn't be tissuing
he mustn't be tissuing
we mustn't be tissuing
you mustn't be tissuing
they mustn't be tissuing	I mustn't have tissued
you mustn't have tissued
he mustn't have tissued
we mustn't have tissued
you mustn't have tissued
they mustn't have tissued	I mustn't have been tissuing
you mustn't have been tissuing
he mustn't have been tissuing
we mustn't have been tissuing
you mustn't have been tissuing
they mustn't have been tissuing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I tissue?
must you tissue?
must he tissue?
must we tissue?
must you tissue?
must they tissue? 	must I be tissuing?
must you be tissuing?
must he be tissuing?
must we be tissuing?
must you be tissuing?
must they be tissuing? 	must I have tissued?
must you have tissued?
must he have tissued?
must we have tissued?
must you have tissued?
must they have tissued? 	must I have been tissuing?
must you have been tissuing?
must he have been tissuing?
must we have been tissuing?
must you have been tissuing?
must they have been tissuing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I tissue?
mustn't you tissue?
mustn't he tissue?
mustn't we tissue?
mustn't you tissue?
mustn't they tissue? 	mustn't I be tissuing?
mustn't you be tissuing?
mustn't he be tissuing?
mustn't we be tissuing?
mustn't you be tissuing?
mustn't they be tissuing? 	mustn't I have tissued?
mustn't you have tissued?
mustn't he have tissued?
mustn't we have tissued?
mustn't you have tissued?
mustn't they have tissued? 	mustn't I have been tissuing?
mustn't you have been tissuing?
mustn't he have been tissuing?
mustn't we have been tissuing?
mustn't you have been tissuing?
mustn't they have been tissuing?