may sieve
Regular verb: sieve - sieved- sieved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

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

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