can filter
Verbo regular: filter - filtered- filtered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can filter
you can filter
she can filter
we can filter
you can filter
they can filter 	I can be filtering
you can be filtering
she can be filtering
we can be filtering
you can be filtering
they can be filtering	I can have filtered
you can have filtered
she can have filtered
we can have filtered
you can have filtered
they can have filtered	I can have been filtering
you can have been filtering
she can have been filtering
we can have been filtering
you can have been filtering
they can have been filtering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot filter
you cannot filter
she cannot filter
we cannot filter
you cannot filter
they cannot filter 	I cannot be filtering
you cannot be filtering
she cannot be filtering
we cannot be filtering
you cannot be filtering
they cannot be filtering	I cannot have filtered
you cannot have filtered
she cannot have filtered
we cannot have filtered
you cannot have filtered
they cannot have filtered	I cannot have been filtering
you cannot have been filtering
she cannot have been filtering
we cannot have been filtering
you cannot have been filtering
they cannot have been filtering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I filter?
can you filter?
can she filter?
can we filter?
can you filter?
can they filter? 	can I be filtering?
can you be filtering?
can she be filtering?
can we be filtering?
can you be filtering?
can they be filtering? 	can I have filtered?
can you have filtered?
can she have filtered?
can we have filtered?
can you have filtered?
can they have filtered? 	can I have been filtering?
can you have been filtering?
can she have been filtering?
can we have been filtering?
can you have been filtering?
can they have been filtering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not filter?
can you not filter?
can she not filter?
can we not filter?
can you not filter?
can they not filter? 	can I not be filtering?
can you not be filtering?
can she not be filtering?
can we not be filtering?
can you not be filtering?
can they not be filtering? 	can I not have filtered?
can you not have filtered?
can she not have filtered?
can we not have filtered?
can you not have filtered?
can they not have filtered? 	can I not have been filtering?
can you not have been filtering?
can she not have been filtering?
can we not have been filtering?
can you not have been filtering?
can they not have been filtering?