English verb conjugation
MAY SIEVE

Regular verb: sieve - sieved - sieved

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?