must trek
Verbe régulier : trek - trekked- trekked
Traduction française : avancer avec peine - faire de la randonnée 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must trek
you must trek
he must trek
we must trek
you must trek
they must trek 	I must be trekking
you must be trekking
he must be trekking
we must be trekking
you must be trekking
they must be trekking	I must have trekked
you must have trekked
he must have trekked
we must have trekked
you must have trekked
they must have trekked	I must have been trekking
you must have been trekking
he must have been trekking
we must have been trekking
you must have been trekking
they must have been trekking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not trek
you must not trek
he must not trek
we must not trek
you must not trek
they must not trek 	I must not be trekking
you must not be trekking
he must not be trekking
we must not be trekking
you must not be trekking
they must not be trekking	I must not have trekked
you must not have trekked
he must not have trekked
we must not have trekked
you must not have trekked
they must not have trekked	I must not have been trekking
you must not have been trekking
he must not have been trekking
we must not have been trekking
you must not have been trekking
they must not have been trekking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I trek?
must you trek?
must he trek?
must we trek?
must you trek?
must they trek? 	must I be trekking?
must you be trekking?
must he be trekking?
must we be trekking?
must you be trekking?
must they be trekking? 	must I have trekked?
must you have trekked?
must he have trekked?
must we have trekked?
must you have trekked?
must they have trekked? 	must I have been trekking?
must you have been trekking?
must he have been trekking?
must we have been trekking?
must you have been trekking?
must they have been trekking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not trek?
must you not trek?
must he not trek?
must we not trek?
must you not trek?
must they not trek? 	must I not be trekking?
must you not be trekking?
must he not be trekking?
must we not be trekking?
must you not be trekking?
must they not be trekking? 	must I not have trekked?
must you not have trekked?
must he not have trekked?
must we not have trekked?
must you not have trekked?
must they not have trekked? 	must I not have been trekking?
must you not have been trekking?
must he not have been trekking?
must we not have been trekking?
must you not have been trekking?
must they not have been trekking?