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 mayn't sieve you mayn't sieve he mayn't sieve we mayn't sieve you mayn't sieve they mayn't sieve	I mayn't be sieving you mayn't be sieving he mayn't be sieving we mayn't be sieving you mayn't be sieving they mayn't be sieving
Perfect	V-ing perfect
I mayn't have sieved you mayn't have sieved he mayn't have sieved we mayn't have sieved you mayn't have sieved they mayn't have sieved	I mayn't have been sieving you mayn't have been sieving he mayn't have been sieving we mayn't have been sieving you mayn't have been sieving they mayn't 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
mayn't I sieve? mayn't you sieve? mayn't he sieve? mayn't we sieve? mayn't you sieve? mayn't they sieve?	mayn't I be sieving? mayn't you be sieving? mayn't he be sieving? mayn't we be sieving? mayn't you be sieving? mayn't they be sieving?
Perfect	V-ing perfect
mayn't I have sieved? mayn't you have sieved? mayn't he have sieved? mayn't we have sieved? mayn't you have sieved? mayn't they have sieved?	mayn't I have been sieving? mayn't you have been sieving? mayn't he have been sieving? mayn't we have been sieving? mayn't you have been sieving? mayn't they have been sieving?