English verb conjugation
COULD WEATHERIZE

Regular verb: weatherize - weatherized - weatherized

Affirmation

Simple form	V-ing form
I could weatherize you could weatherize he could weatherize we could weatherize you could weatherize they could weatherize	I could be weatherizing you could be weatherizing he could be weatherizing we could be weatherizing you could be weatherizing they could be weatherizing
Perfect	V-ing perfect
I could have weatherized you could have weatherized he could have weatherized we could have weatherized you could have weatherized they could have weatherized	I could have been weatherizing you could have been weatherizing he could have been weatherizing we could have been weatherizing you could have been weatherizing they could have been weatherizing

Negation

Simple form	V-ing form
I couldn't weatherize you couldn't weatherize he couldn't weatherize we couldn't weatherize you couldn't weatherize they couldn't weatherize	I couldn't be weatherizing you couldn't be weatherizing he couldn't be weatherizing we couldn't be weatherizing you couldn't be weatherizing they couldn't be weatherizing
Perfect	V-ing perfect
I couldn't have weatherized you couldn't have weatherized he couldn't have weatherized we couldn't have weatherized you couldn't have weatherized they couldn't have weatherized	I couldn't have been weatherizing you couldn't have been weatherizing he couldn't have been weatherizing we couldn't have been weatherizing you couldn't have been weatherizing they couldn't have been weatherizing

Interrogative form

Simple form	V-ing form
could I weatherize? could you weatherize? could he weatherize? could we weatherize? could you weatherize? could they weatherize?	could I be weatherizing? could you be weatherizing? could he be weatherizing? could we be weatherizing? could you be weatherizing? could they be weatherizing?
Perfect	V-ing perfect
could I have weatherized? could you have weatherized? could he have weatherized? could we have weatherized? could you have weatherized? could they have weatherized?	could I have been weatherizing? could you have been weatherizing? could he have been weatherizing? could we have been weatherizing? could you have been weatherizing? could they have been weatherizing?

Interro-negative form

Simple form	V-ing form
couldn't I weatherize? couldn't you weatherize? couldn't he weatherize? couldn't we weatherize? couldn't you weatherize? couldn't they weatherize?	couldn't I be weatherizing? couldn't you be weatherizing? couldn't he be weatherizing? couldn't we be weatherizing? couldn't you be weatherizing? couldn't they be weatherizing?
Perfect	V-ing perfect
couldn't I have weatherized? couldn't you have weatherized? couldn't he have weatherized? couldn't we have weatherized? couldn't you have weatherized? couldn't they have weatherized?	couldn't I have been weatherizing? couldn't you have been weatherizing? couldn't he have been weatherizing? couldn't we have been weatherizing? couldn't you have been weatherizing? couldn't they have been weatherizing?