English verb conjugation
COULD BALLOON

Regular verb: balloon - ballooned - ballooned

Affirmation

Simple form	V-ing form
I could balloon you could balloon he could balloon we could balloon you could balloon they could balloon	I could be ballooning you could be ballooning he could be ballooning we could be ballooning you could be ballooning they could be ballooning
Perfect	V-ing perfect
I could have ballooned you could have ballooned he could have ballooned we could have ballooned you could have ballooned they could have ballooned	I could have been ballooning you could have been ballooning he could have been ballooning we could have been ballooning you could have been ballooning they could have been ballooning

Negation

Simple form	V-ing form
I could not balloon you could not balloon he could not balloon we could not balloon you could not balloon they could not balloon	I could not be ballooning you could not be ballooning he could not be ballooning we could not be ballooning you could not be ballooning they could not be ballooning
Perfect	V-ing perfect
I could not have ballooned you could not have ballooned he could not have ballooned we could not have ballooned you could not have ballooned they could not have ballooned	I could not have been ballooning you could not have been ballooning he could not have been ballooning we could not have been ballooning you could not have been ballooning they could not have been ballooning

Interrogative form

Simple form	V-ing form
could I balloon? could you balloon? could he balloon? could we balloon? could you balloon? could they balloon?	could I be ballooning? could you be ballooning? could he be ballooning? could we be ballooning? could you be ballooning? could they be ballooning?
Perfect	V-ing perfect
could I have ballooned? could you have ballooned? could he have ballooned? could we have ballooned? could you have ballooned? could they have ballooned?	could I have been ballooning? could you have been ballooning? could he have been ballooning? could we have been ballooning? could you have been ballooning? could they have been ballooning?

Interro-negative form

Simple form	V-ing form
could I not balloon? could you not balloon? could he not balloon? could we not balloon? could you not balloon? could they not balloon?	could I not be ballooning? could you not be ballooning? could he not be ballooning? could we not be ballooning? could you not be ballooning? could they not be ballooning?
Perfect	V-ing perfect
could I not have ballooned? could you not have ballooned? could he not have ballooned? could we not have ballooned? could you not have ballooned? could they not have ballooned?	could I not have been ballooning? could you not have been ballooning? could he not have been ballooning? could we not have been ballooning? could you not have been ballooning? could they not have been ballooning?