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 can't winnow you can't winnow he can't winnow we can't winnow you can't winnow they can't winnow	I can't be winnowing you can't be winnowing he can't be winnowing we can't be winnowing you can't be winnowing they can't be winnowing
Perfect	V-ing perfect
I can't have winnowed you can't have winnowed he can't have winnowed we can't have winnowed you can't have winnowed they can't have winnowed	I can't have been winnowing you can't have been winnowing he can't have been winnowing we can't have been winnowing you can't have been winnowing they can't 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't I winnow? can't you winnow? can't he winnow? can't we winnow? can't you winnow? can't they winnow?	can't I be winnowing? can't you be winnowing? can't he be winnowing? can't we be winnowing? can't you be winnowing? can't they be winnowing?
Perfect	V-ing perfect
can't I have winnowed? can't you have winnowed? can't he have winnowed? can't we have winnowed? can't you have winnowed? can't they have winnowed?	can't I have been winnowing? can't you have been winnowing? can't he have been winnowing? can't we have been winnowing? can't you have been winnowing? can't they have been winnowing?