English verb conjugation
COULD HUMIDIFY

Regular verb: humidify - humidified - humidified

Affirmation

Simple form	V-ing form
I could humidify you could humidify he could humidify we could humidify you could humidify they could humidify	I could be humidifying you could be humidifying he could be humidifying we could be humidifying you could be humidifying they could be humidifying
Perfect	V-ing perfect
I could have humidified you could have humidified he could have humidified we could have humidified you could have humidified they could have humidified	I could have been humidifying you could have been humidifying he could have been humidifying we could have been humidifying you could have been humidifying they could have been humidifying

Negation

Simple form	V-ing form
I could not humidify you could not humidify he could not humidify we could not humidify you could not humidify they could not humidify	I could not be humidifying you could not be humidifying he could not be humidifying we could not be humidifying you could not be humidifying they could not be humidifying
Perfect	V-ing perfect
I could not have humidified you could not have humidified he could not have humidified we could not have humidified you could not have humidified they could not have humidified	I could not have been humidifying you could not have been humidifying he could not have been humidifying we could not have been humidifying you could not have been humidifying they could not have been humidifying

Interrogative form

Simple form	V-ing form
could I humidify? could you humidify? could he humidify? could we humidify? could you humidify? could they humidify?	could I be humidifying? could you be humidifying? could he be humidifying? could we be humidifying? could you be humidifying? could they be humidifying?
Perfect	V-ing perfect
could I have humidified? could you have humidified? could he have humidified? could we have humidified? could you have humidified? could they have humidified?	could I have been humidifying? could you have been humidifying? could he have been humidifying? could we have been humidifying? could you have been humidifying? could they have been humidifying?

Interro-negative form

Simple form	V-ing form
could I not humidify? could you not humidify? could he not humidify? could we not humidify? could you not humidify? could they not humidify?	could I not be humidifying? could you not be humidifying? could he not be humidifying? could we not be humidifying? could you not be humidifying? could they not be humidifying?
Perfect	V-ing perfect
could I not have humidified? could you not have humidified? could he not have humidified? could we not have humidified? could you not have humidified? could they not have humidified?	could I not have been humidifying? could you not have been humidifying? could he not have been humidifying? could we not have been humidifying? could you not have been humidifying? could they not have been humidifying?