must pretreat
Verbe régulier : pretreat - pretreated- pretreated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must pretreat
you must pretreat
he must pretreat
we must pretreat
you must pretreat
they must pretreat 	I must be pretreating
you must be pretreating
he must be pretreating
we must be pretreating
you must be pretreating
they must be pretreating	I must have pretreated
you must have pretreated
he must have pretreated
we must have pretreated
you must have pretreated
they must have pretreated	I must have been pretreating
you must have been pretreating
he must have been pretreating
we must have been pretreating
you must have been pretreating
they must have been pretreating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not pretreat
you must not pretreat
he must not pretreat
we must not pretreat
you must not pretreat
they must not pretreat 	I must not be pretreating
you must not be pretreating
he must not be pretreating
we must not be pretreating
you must not be pretreating
they must not be pretreating	I must not have pretreated
you must not have pretreated
he must not have pretreated
we must not have pretreated
you must not have pretreated
they must not have pretreated	I must not have been pretreating
you must not have been pretreating
he must not have been pretreating
we must not have been pretreating
you must not have been pretreating
they must not have been pretreating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I pretreat?
must you pretreat?
must he pretreat?
must we pretreat?
must you pretreat?
must they pretreat? 	must I be pretreating?
must you be pretreating?
must he be pretreating?
must we be pretreating?
must you be pretreating?
must they be pretreating? 	must I have pretreated?
must you have pretreated?
must he have pretreated?
must we have pretreated?
must you have pretreated?
must they have pretreated? 	must I have been pretreating?
must you have been pretreating?
must he have been pretreating?
must we have been pretreating?
must you have been pretreating?
must they have been pretreating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not pretreat?
must you not pretreat?
must he not pretreat?
must we not pretreat?
must you not pretreat?
must they not pretreat? 	must I not be pretreating?
must you not be pretreating?
must he not be pretreating?
must we not be pretreating?
must you not be pretreating?
must they not be pretreating? 	must I not have pretreated?
must you not have pretreated?
must he not have pretreated?
must we not have pretreated?
must you not have pretreated?
must they not have pretreated? 	must I not have been pretreating?
must you not have been pretreating?
must he not have been pretreating?
must we not have been pretreating?
must you not have been pretreating?
must they not have been pretreating?