English verb conjugation
CAN WINNOW

Regular verb: winnow - winnowed - winnowed

Affirmation

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