can sieve
Regular verb: sieve - sieved- sieved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sieve
you can sieve
she can sieve
we can sieve
you can sieve
they can sieve 	I can be sieving
you can be sieving
she can be sieving
we can be sieving
you can be sieving
they can be sieving	I can have sieved
you can have sieved
she can have sieved
we can have sieved
you can have sieved
they can have sieved	I can have been sieving
you can have been sieving
she can have been sieving
we can have been sieving
you can have been sieving
they can have been sieving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot sieve
you cannot sieve
she cannot sieve
we cannot sieve
you cannot sieve
they cannot sieve 	I cannot be sieving
you cannot be sieving
she cannot be sieving
we cannot be sieving
you cannot be sieving
they cannot be sieving	I cannot have sieved
you cannot have sieved
she cannot have sieved
we cannot have sieved
you cannot have sieved
they cannot have sieved	I cannot have been sieving
you cannot have been sieving
she cannot have been sieving
we cannot have been sieving
you cannot have been sieving
they cannot have been sieving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sieve?
can you sieve?
can she sieve?
can we sieve?
can you sieve?
can they sieve? 	can I be sieving?
can you be sieving?
can she be sieving?
can we be sieving?
can you be sieving?
can they be sieving? 	can I have sieved?
can you have sieved?
can she have sieved?
can we have sieved?
can you have sieved?
can they have sieved? 	can I have been sieving?
can you have been sieving?
can she have been sieving?
can we have been sieving?
can you have been sieving?
can they have been sieving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not sieve?
can you not sieve?
can she not sieve?
can we not sieve?
can you not sieve?
can they not sieve? 	can I not be sieving?
can you not be sieving?
can she not be sieving?
can we not be sieving?
can you not be sieving?
can they not be sieving? 	can I not have sieved?
can you not have sieved?
can she not have sieved?
can we not have sieved?
can you not have sieved?
can they not have sieved? 	can I not have been sieving?
can you not have been sieving?
can she not have been sieving?
can we not have been sieving?
can you not have been sieving?
can they not have been sieving?