could pretreat
Verbo regular: pretreat - pretreated- pretreated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could pretreat
you could pretreat
she could pretreat
we could pretreat
you could pretreat
they could pretreat 	I could be pretreating
you could be pretreating
she could be pretreating
we could be pretreating
you could be pretreating
they could be pretreating	I could have pretreated
you could have pretreated
she could have pretreated
we could have pretreated
you could have pretreated
they could have pretreated	I could have been pretreating
you could have been pretreating
she could have been pretreating
we could have been pretreating
you could have been pretreating
they could have been pretreating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't pretreat
you couldn't pretreat
she couldn't pretreat
we couldn't pretreat
you couldn't pretreat
they couldn't pretreat 	I couldn't be pretreating
you couldn't be pretreating
she couldn't be pretreating
we couldn't be pretreating
you couldn't be pretreating
they couldn't be pretreating	I couldn't have pretreated
you couldn't have pretreated
she couldn't have pretreated
we couldn't have pretreated
you couldn't have pretreated
they couldn't have pretreated	I couldn't have been pretreating
you couldn't have been pretreating
she couldn't have been pretreating
we couldn't have been pretreating
you couldn't have been pretreating
they couldn't have been pretreating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I pretreat?
could you pretreat?
could she pretreat?
could we pretreat?
could you pretreat?
could they pretreat? 	could I be pretreating?
could you be pretreating?
could she be pretreating?
could we be pretreating?
could you be pretreating?
could they be pretreating? 	could I have pretreated?
could you have pretreated?
could she have pretreated?
could we have pretreated?
could you have pretreated?
could they have pretreated? 	could I have been pretreating?
could you have been pretreating?
could she have been pretreating?
could we have been pretreating?
could you have been pretreating?
could they have been pretreating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I pretreat?
couldn't you pretreat?
couldn't she pretreat?
couldn't we pretreat?
couldn't you pretreat?
couldn't they pretreat? 	couldn't I be pretreating?
couldn't you be pretreating?
couldn't she be pretreating?
couldn't we be pretreating?
couldn't you be pretreating?
couldn't they be pretreating? 	couldn't I have pretreated?
couldn't you have pretreated?
couldn't she have pretreated?
couldn't we have pretreated?
couldn't you have pretreated?
couldn't they have pretreated? 	couldn't I have been pretreating?
couldn't you have been pretreating?
couldn't she have been pretreating?
couldn't we have been pretreating?
couldn't you have been pretreating?
couldn't they have been pretreating?