can winnow
Regular verb: winnow - winnowed- winnowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can winnow
you can winnow
he can winnow
we can winnow
you can winnow
they can winnow 	I can be winnowing
you can be winnowing
he can be winnowing
we can be winnowing
you can be winnowing
they can be winnowing	I can have winnowed
you can have winnowed
he can have winnowed
we can have winnowed
you can have winnowed
they can have winnowed	I can have been winnowing
you can have been winnowing
he can have been winnowing
we can have been winnowing
you can have been winnowing
they can have been winnowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot winnow
you cannot winnow
he cannot winnow
we cannot winnow
you cannot winnow
they cannot winnow 	I cannot be winnowing
you cannot be winnowing
he cannot be winnowing
we cannot be winnowing
you cannot be winnowing
they cannot be winnowing	I cannot have winnowed
you cannot have winnowed
he cannot have winnowed
we cannot have winnowed
you cannot have winnowed
they cannot have winnowed	I cannot have been winnowing
you cannot have been winnowing
he cannot have been winnowing
we cannot have been winnowing
you cannot have been winnowing
they cannot have been winnowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I winnow?
can you winnow?
can he winnow?
can we winnow?
can you winnow?
can they winnow? 	can I be winnowing?
can you be winnowing?
can he be winnowing?
can we be winnowing?
can you be winnowing?
can they be winnowing? 	can I have winnowed?
can you have winnowed?
can he have winnowed?
can we have winnowed?
can you have winnowed?
can they have winnowed? 	can I have been winnowing?
can you have been winnowing?
can he have been winnowing?
can we have been winnowing?
can you have been winnowing?
can they have been winnowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not winnow?
can you not winnow?
can he not winnow?
can we not winnow?
can you not winnow?
can they not winnow? 	can I not be winnowing?
can you not be winnowing?
can he not be winnowing?
can we not be winnowing?
can you not be winnowing?
can they not be winnowing? 	can I not have winnowed?
can you not have winnowed?
can he not have winnowed?
can we not have winnowed?
can you not have winnowed?
can they not have winnowed? 	can I not have been winnowing?
can you not have been winnowing?
can he not have been winnowing?
can we not have been winnowing?
can you not have been winnowing?
can they not have been winnowing?