may sieve
Verbo regular: sieve - sieved- sieved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may sieve
you may sieve
he may sieve
we may sieve
you may sieve
they may sieve 	I may be sieving
you may be sieving
he may be sieving
we may be sieving
you may be sieving
they may be sieving	I may have sieved
you may have sieved
he may have sieved
we may have sieved
you may have sieved
they may have sieved	I may have been sieving
you may have been sieving
he may have been sieving
we may have been sieving
you may have been sieving
they may have been sieving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may not sieve
you may not sieve
he may not sieve
we may not sieve
you may not sieve
they may not sieve 	I may not be sieving
you may not be sieving
he may not be sieving
we may not be sieving
you may not be sieving
they may not be sieving	I may not have sieved
you may not have sieved
he may not have sieved
we may not have sieved
you may not have sieved
they may not have sieved	I may not have been sieving
you may not have been sieving
he may not have been sieving
we may not have been sieving
you may not have been sieving
they may not have been sieving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I sieve?
may you sieve?
may he sieve?
may we sieve?
may you sieve?
may they sieve? 	may I be sieving?
may you be sieving?
may he be sieving?
may we be sieving?
may you be sieving?
may they be sieving? 	may I have sieved?
may you have sieved?
may he have sieved?
may we have sieved?
may you have sieved?
may they have sieved? 	may I have been sieving?
may you have been sieving?
may he have been sieving?
may we have been sieving?
may you have been sieving?
may they have been sieving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I not sieve?
may you not sieve?
may he not sieve?
may we not sieve?
may you not sieve?
may they not sieve? 	may I not be sieving?
may you not be sieving?
may he not be sieving?
may we not be sieving?
may you not be sieving?
may they not be sieving? 	may I not have sieved?
may you not have sieved?
may he not have sieved?
may we not have sieved?
may you not have sieved?
may they not have sieved? 	may I not have been sieving?
may you not have been sieving?
may he not have been sieving?
may we not have been sieving?
may you not have been sieving?
may they not have been sieving?