English verb conjugation
MUST WINNOW

Regular verb: winnow - winnowed - winnowed

Affirmation

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

Negation

Simple form	V-ing form
I mustn't winnow you mustn't winnow he mustn't winnow we mustn't winnow you mustn't winnow they mustn't winnow	I mustn't be winnowing you mustn't be winnowing he mustn't be winnowing we mustn't be winnowing you mustn't be winnowing they mustn't be winnowing
Perfect	V-ing perfect
I mustn't have winnowed you mustn't have winnowed he mustn't have winnowed we mustn't have winnowed you mustn't have winnowed they mustn't have winnowed	I mustn't have been winnowing you mustn't have been winnowing he mustn't have been winnowing we mustn't have been winnowing you mustn't have been winnowing they mustn't have been winnowing

Interrogative form

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

Interro-negative form

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