English verb conjugation
COULD AIR

Regular verb: air - aired - aired

Affirmation

Simple form	V-ing form
I could air you could air she could air we could air you could air they could air	I could be airing you could be airing she could be airing we could be airing you could be airing they could be airing
Perfect	V-ing perfect
I could have aired you could have aired she could have aired we could have aired you could have aired they could have aired	I could have been airing you could have been airing she could have been airing we could have been airing you could have been airing they could have been airing

Negation

Simple form	V-ing form
I could not air you could not air she could not air we could not air you could not air they could not air	I could not be airing you could not be airing she could not be airing we could not be airing you could not be airing they could not be airing
Perfect	V-ing perfect
I could not have aired you could not have aired she could not have aired we could not have aired you could not have aired they could not have aired	I could not have been airing you could not have been airing she could not have been airing we could not have been airing you could not have been airing they could not have been airing

Interrogative form

Simple form	V-ing form
could I air? could you air? could she air? could we air? could you air? could they air?	could I be airing? could you be airing? could she be airing? could we be airing? could you be airing? could they be airing?
Perfect	V-ing perfect
could I have aired? could you have aired? could she have aired? could we have aired? could you have aired? could they have aired?	could I have been airing? could you have been airing? could she have been airing? could we have been airing? could you have been airing? could they have been airing?

Interro-negative form

Simple form	V-ing form
could I not air? could you not air? could she not air? could we not air? could you not air? could they not air?	could I not be airing? could you not be airing? could she not be airing? could we not be airing? could you not be airing? could they not be airing?
Perfect	V-ing perfect
could I not have aired? could you not have aired? could she not have aired? could we not have aired? could you not have aired? could they not have aired?	could I not have been airing? could you not have been airing? could she not have been airing? could we not have been airing? could you not have been airing? could they not have been airing?