must swim
Verbe irrégulier : swim - swam- swum
Traduction française : nager 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must swim
you must swim
he must swim
we must swim
you must swim
they must swim 	I must be swimming
you must be swimming
he must be swimming
we must be swimming
you must be swimming
they must be swimming	I must have swum
you must have swum
he must have swum
we must have swum
you must have swum
they must have swum	I must have been swimming
you must have been swimming
he must have been swimming
we must have been swimming
you must have been swimming
they must have been swimming	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't swim
you mustn't swim
he mustn't swim
we mustn't swim
you mustn't swim
they mustn't swim 	I mustn't be swimming
you mustn't be swimming
he mustn't be swimming
we mustn't be swimming
you mustn't be swimming
they mustn't be swimming	I mustn't have swum
you mustn't have swum
he mustn't have swum
we mustn't have swum
you mustn't have swum
they mustn't have swum	I mustn't have been swimming
you mustn't have been swimming
he mustn't have been swimming
we mustn't have been swimming
you mustn't have been swimming
they mustn't have been swimming	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I swim?
must you swim?
must he swim?
must we swim?
must you swim?
must they swim? 	must I be swimming?
must you be swimming?
must he be swimming?
must we be swimming?
must you be swimming?
must they be swimming? 	must I have swum?
must you have swum?
must he have swum?
must we have swum?
must you have swum?
must they have swum? 	must I have been swimming?
must you have been swimming?
must he have been swimming?
must we have been swimming?
must you have been swimming?
must they have been swimming? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I swim?
mustn't you swim?
mustn't he swim?
mustn't we swim?
mustn't you swim?
mustn't they swim? 	mustn't I be swimming?
mustn't you be swimming?
mustn't he be swimming?
mustn't we be swimming?
mustn't you be swimming?
mustn't they be swimming? 	mustn't I have swum?
mustn't you have swum?
mustn't he have swum?
mustn't we have swum?
mustn't you have swum?
mustn't they have swum? 	mustn't I have been swimming?
mustn't you have been swimming?
mustn't he have been swimming?
mustn't we have been swimming?
mustn't you have been swimming?
mustn't they have been swimming?