can pretreat
Verbo regular: pretreat - pretreated- pretreated

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

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

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

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