must trail
Verbe régulier : trail - trailed- trailed
Traduction française : suivre - traîner 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must trail
you must trail
she must trail
we must trail
you must trail
they must trail 	I must be trailing
you must be trailing
she must be trailing
we must be trailing
you must be trailing
they must be trailing	I must have trailed
you must have trailed
she must have trailed
we must have trailed
you must have trailed
they must have trailed	I must have been trailing
you must have been trailing
she must have been trailing
we must have been trailing
you must have been trailing
they must have been trailing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't trail
you mustn't trail
she mustn't trail
we mustn't trail
you mustn't trail
they mustn't trail 	I mustn't be trailing
you mustn't be trailing
she mustn't be trailing
we mustn't be trailing
you mustn't be trailing
they mustn't be trailing	I mustn't have trailed
you mustn't have trailed
she mustn't have trailed
we mustn't have trailed
you mustn't have trailed
they mustn't have trailed	I mustn't have been trailing
you mustn't have been trailing
she mustn't have been trailing
we mustn't have been trailing
you mustn't have been trailing
they mustn't have been trailing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I trail?
must you trail?
must she trail?
must we trail?
must you trail?
must they trail? 	must I be trailing?
must you be trailing?
must she be trailing?
must we be trailing?
must you be trailing?
must they be trailing? 	must I have trailed?
must you have trailed?
must she have trailed?
must we have trailed?
must you have trailed?
must they have trailed? 	must I have been trailing?
must you have been trailing?
must she have been trailing?
must we have been trailing?
must you have been trailing?
must they have been trailing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I trail?
mustn't you trail?
mustn't she trail?
mustn't we trail?
mustn't you trail?
mustn't they trail? 	mustn't I be trailing?
mustn't you be trailing?
mustn't she be trailing?
mustn't we be trailing?
mustn't you be trailing?
mustn't they be trailing? 	mustn't I have trailed?
mustn't you have trailed?
mustn't she have trailed?
mustn't we have trailed?
mustn't you have trailed?
mustn't they have trailed? 	mustn't I have been trailing?
mustn't you have been trailing?
mustn't she have been trailing?
mustn't we have been trailing?
mustn't you have been trailing?
mustn't they have been trailing?