can abstain
Verbo regular: abstain - abstained- abstained

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can abstain
you can abstain
he can abstain
we can abstain
you can abstain
they can abstain 	I can be abstaining
you can be abstaining
he can be abstaining
we can be abstaining
you can be abstaining
they can be abstaining	I can have abstained
you can have abstained
he can have abstained
we can have abstained
you can have abstained
they can have abstained	I can have been abstaining
you can have been abstaining
he can have been abstaining
we can have been abstaining
you can have been abstaining
they can have been abstaining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot abstain
you cannot abstain
he cannot abstain
we cannot abstain
you cannot abstain
they cannot abstain 	I cannot be abstaining
you cannot be abstaining
he cannot be abstaining
we cannot be abstaining
you cannot be abstaining
they cannot be abstaining	I cannot have abstained
you cannot have abstained
he cannot have abstained
we cannot have abstained
you cannot have abstained
they cannot have abstained	I cannot have been abstaining
you cannot have been abstaining
he cannot have been abstaining
we cannot have been abstaining
you cannot have been abstaining
they cannot have been abstaining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I abstain?
can you abstain?
can he abstain?
can we abstain?
can you abstain?
can they abstain? 	can I be abstaining?
can you be abstaining?
can he be abstaining?
can we be abstaining?
can you be abstaining?
can they be abstaining? 	can I have abstained?
can you have abstained?
can he have abstained?
can we have abstained?
can you have abstained?
can they have abstained? 	can I have been abstaining?
can you have been abstaining?
can he have been abstaining?
can we have been abstaining?
can you have been abstaining?
can they have been abstaining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not abstain?
can you not abstain?
can he not abstain?
can we not abstain?
can you not abstain?
can they not abstain? 	can I not be abstaining?
can you not be abstaining?
can he not be abstaining?
can we not be abstaining?
can you not be abstaining?
can they not be abstaining? 	can I not have abstained?
can you not have abstained?
can he not have abstained?
can we not have abstained?
can you not have abstained?
can they not have abstained? 	can I not have been abstaining?
can you not have been abstaining?
can he not have been abstaining?
can we not have been abstaining?
can you not have been abstaining?
can they not have been abstaining?