Present participle; Past participle - sieving - sieved Present - sieve - sieve - sieves - sieve - sieve - sieve Past - sieved - sieved - sieved - sieved - sieved - sieved Future - will sieve - will sieve - will sieve - will sieve - will sieve - will sieve Present conditional - would sieve - would sieve - would sieve - would sieve - would sieve - would sieve Present Perfect - have sieved - have sieved - has sieved - have sieved - have sieved - have sieved Past Perfect - had sieved - had sieved - had sieved - had sieved - had sieved - had sieved Future Perfect - will have sieved - will have sieved - will have sieved - will have sieved - will have sieved - will have sieved Past conditional - would have sieved - would have sieved - would have sieved - would have sieved - would have sieved - would have sieved Imperative - - - sieve - - - - - - - -