can sieve
Verbo regular: sieve - sieved- sieved

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can sieve
you can sieve
he can sieve
we can sieve
you can sieve
they can sieve 	I can be sieving
you can be sieving
he can be sieving
we can be sieving
you can be sieving
they can be sieving	I can have sieved
you can have sieved
he can have sieved
we can have sieved
you can have sieved
they can have sieved	I can have been sieving
you can have been sieving
he can have been sieving
we can have been sieving
you can have been sieving
they can have been sieving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot sieve
you cannot sieve
he cannot sieve
we cannot sieve
you cannot sieve
they cannot sieve 	I cannot be sieving
you cannot be sieving
he cannot be sieving
we cannot be sieving
you cannot be sieving
they cannot be sieving	I cannot have sieved
you cannot have sieved
he cannot have sieved
we cannot have sieved
you cannot have sieved
they cannot have sieved	I cannot have been sieving
you cannot have been sieving
he cannot have been sieving
we cannot have been sieving
you cannot have been sieving
they cannot have been sieving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I sieve?
can you sieve?
can he sieve?
can we sieve?
can you sieve?
can they sieve? 	can I be sieving?
can you be sieving?
can he be sieving?
can we be sieving?
can you be sieving?
can they be sieving? 	can I have sieved?
can you have sieved?
can he have sieved?
can we have sieved?
can you have sieved?
can they have sieved? 	can I have been sieving?
can you have been sieving?
can he have been sieving?
can we have been sieving?
can you have been sieving?
can they have been sieving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not sieve?
can you not sieve?
can he not sieve?
can we not sieve?
can you not sieve?
can they not sieve? 	can I not be sieving?
can you not be sieving?
can he not be sieving?
can we not be sieving?
can you not be sieving?
can they not be sieving? 	can I not have sieved?
can you not have sieved?
can he not have sieved?
can we not have sieved?
can you not have sieved?
can they not have sieved? 	can I not have been sieving?
can you not have been sieving?
can he not have been sieving?
can we not have been sieving?
can you not have been sieving?
can they not have been sieving?