must travel
Verbe régulier : travel - travelled- travelled
Traduction française : voyager - faire 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must travel
you must travel
he must travel
we must travel
you must travel
they must travel 	I must be travelling
you must be travelling
he must be travelling
we must be travelling
you must be travelling
they must be travelling	I must have travelled
you must have travelled
he must have travelled
we must have travelled
you must have travelled
they must have travelled	I must have been travelling
you must have been travelling
he must have been travelling
we must have been travelling
you must have been travelling
they must have been travelling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't travel
you mustn't travel
he mustn't travel
we mustn't travel
you mustn't travel
they mustn't travel 	I mustn't be travelling
you mustn't be travelling
he mustn't be travelling
we mustn't be travelling
you mustn't be travelling
they mustn't be travelling	I mustn't have travelled
you mustn't have travelled
he mustn't have travelled
we mustn't have travelled
you mustn't have travelled
they mustn't have travelled	I mustn't have been travelling
you mustn't have been travelling
he mustn't have been travelling
we mustn't have been travelling
you mustn't have been travelling
they mustn't have been travelling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I travel?
must you travel?
must he travel?
must we travel?
must you travel?
must they travel? 	must I be travelling?
must you be travelling?
must he be travelling?
must we be travelling?
must you be travelling?
must they be travelling? 	must I have travelled?
must you have travelled?
must he have travelled?
must we have travelled?
must you have travelled?
must they have travelled? 	must I have been travelling?
must you have been travelling?
must he have been travelling?
must we have been travelling?
must you have been travelling?
must they have been travelling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I travel?
mustn't you travel?
mustn't he travel?
mustn't we travel?
mustn't you travel?
mustn't they travel? 	mustn't I be travelling?
mustn't you be travelling?
mustn't he be travelling?
mustn't we be travelling?
mustn't you be travelling?
mustn't they be travelling? 	mustn't I have travelled?
mustn't you have travelled?
mustn't he have travelled?
mustn't we have travelled?
mustn't you have travelled?
mustn't they have travelled? 	mustn't I have been travelling?
mustn't you have been travelling?
mustn't he have been travelling?
mustn't we have been travelling?
mustn't you have been travelling?
mustn't they have been travelling?