English verb conjugation
MAY SIEVE

Regular verb: sieve - sieved - sieved

Affirmation

Simple form	V-ing form
I may sieve you may sieve she may sieve we may sieve you may sieve they may sieve	I may be sieving you may be sieving she 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 she 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 she 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 she 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 she 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 she 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 she 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 she sieve? may we sieve? may you sieve? may they sieve?	may I be sieving? may you be sieving? may she 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 she 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 she 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 she 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 she 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 she 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 she not have been sieving? may we not have been sieving? may you not have been sieving? may they not have been sieving?