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 must not tissue
you must not tissue
he must not tissue
we must not tissue
you must not tissue
they must not tissue 	I must not be tissuing
you must not be tissuing
he must not be tissuing
we must not be tissuing
you must not be tissuing
they must not be tissuing	I must not have tissued
you must not have tissued
he must not have tissued
we must not have tissued
you must not have tissued
they must not have tissued	I must not have been tissuing
you must not have been tissuing
he must not have been tissuing
we must not have been tissuing
you must not have been tissuing
they must not 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 	
must I not tissue?
must you not tissue?
must he not tissue?
must we not tissue?
must you not tissue?
must they not tissue? 	must I not be tissuing?
must you not be tissuing?
must he not be tissuing?
must we not be tissuing?
must you not be tissuing?
must they not be tissuing? 	must I not have tissued?
must you not have tissued?
must he not have tissued?
must we not have tissued?
must you not have tissued?
must they not have tissued? 	must I not have been tissuing?
must you not have been tissuing?
must he not have been tissuing?
must we not have been tissuing?
must you not have been tissuing?
must they not have been tissuing?