ought to pretreat
Verbo regular: pretreat - pretreated- pretreated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought to pretreat
you ought to pretreat
he ought to pretreat
we ought to pretreat
you ought to pretreat
they ought to pretreat 	I ought to be pretreating
you ought to be pretreating
he ought to be pretreating
we ought to be pretreating
you ought to be pretreating
they ought to be pretreating	I ought to have pretreated
you ought to have pretreated
he ought to have pretreated
we ought to have pretreated
you ought to have pretreated
they ought to have pretreated	I ought to have been pretreating
you ought to have been pretreating
he ought to have been pretreating
we ought to have been pretreating
you ought to have been pretreating
they ought to have been pretreating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought not to pretreat
you ought not to pretreat
he ought not to pretreat
we ought not to pretreat
you ought not to pretreat
they ought not to pretreat 	I ought not to pretreating
you ought not to pretreating
he ought not to pretreating
we ought not to pretreating
you ought not to pretreating
they ought not to pretreating	I ought not to have pretreated
you ought not to have pretreated
he ought not to have pretreated
we ought not to have pretreated
you ought not to have pretreated
they ought not to have pretreated	I ought not to have been pretreating
you ought not to have been pretreating
he ought not to have been pretreating
we ought not to have been pretreating
you ought not to have been pretreating
they ought not to have been pretreating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought to I pretreat?
ought to you pretreat?
ought to he pretreat?
ought to we pretreat?
ought to you pretreat?
ought to they pretreat? 	ought to I be pretreating?
ought to you be pretreating?
ought to he be pretreating?
ought to we be pretreating?
ought to you be pretreating?
ought to they be pretreating? 	ought to I have pretreated?
ought to you have pretreated?
ought to he have pretreated?
ought to we have pretreated?
ought to you have pretreated?
ought to they have pretreated? 	ought to I have been pretreating?
ought to you have been pretreating?
ought to he have been pretreating?
ought to we have been pretreating?
ought to you have been pretreating?
ought to they have been pretreating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought I not to pretreat?
ought you not to pretreat?
ought he not to pretreat?
ought we not to pretreat?
ought you not to pretreat?
ought they not to pretreat? 	ought I not to be pretreating?
ought you not to be pretreating?
ought he not to be pretreating?
ought we not to be pretreating?
ought you not to be pretreating?
ought they not to be pretreating? 	ought I not to have pretreated?
ought you not to have pretreated?
ought he not to have pretreated?
ought we not to have pretreated?
ought you not to have pretreated?
ought they not to have pretreated? 	ought I not to have been pretreating?
ought you not to have been pretreating?
ought he not to have been pretreating?
ought we not to have been pretreating?
ought you not to have been pretreating?
ought they not to have been pretreating?