I can balloon you can balloon she can balloon we can balloon you can balloon they can balloon
V-ing form
I can be ballooning you can be ballooning she can be ballooning we can be ballooning you can be ballooning they can be ballooning
Perfect
I can have ballooned you can have ballooned she can have ballooned we can have ballooned you can have ballooned they can have ballooned
V-ing perfect
I can have been ballooning you can have been ballooning she can have been ballooning we can have been ballooning you can have been ballooning they can have been ballooning
Negation
Simple form
I can't balloon you can't balloon she can't balloon we can't balloon you can't balloon they can't balloon
V-ing form
I can't be ballooning you can't be ballooning she can't be ballooning we can't be ballooning you can't be ballooning they can't be ballooning
Perfect
I can't have ballooned you can't have ballooned she can't have ballooned we can't have ballooned you can't have ballooned they can't have ballooned
V-ing perfect
I can't have been ballooning you can't have been ballooning she can't have been ballooning we can't have been ballooning you can't have been ballooning they can't have been ballooning
Interrogative form
Simple form
can I balloon? can you balloon? can she balloon? can we balloon? can you balloon? can they balloon?
V-ing form
can I be ballooning? can you be ballooning? can she be ballooning? can we be ballooning? can you be ballooning? can they be ballooning?
Perfect
can I have ballooned? can you have ballooned? can she have ballooned? can we have ballooned? can you have ballooned? can they have ballooned?
V-ing perfect
can I have been ballooning? can you have been ballooning? can she have been ballooning? can we have been ballooning? can you have been ballooning? can they have been ballooning?
Interro-negative form
Simple form
can't I balloon? can't you balloon? can't she balloon? can't we balloon? can't you balloon? can't they balloon?
V-ing form
can't I be ballooning? can't you be ballooning? can't she be ballooning? can't we be ballooning? can't you be ballooning? can't they be ballooning?
Perfect
can't I have ballooned? can't you have ballooned? can't she have ballooned? can't we have ballooned? can't you have ballooned? can't they have ballooned?
V-ing perfect
can't I have been ballooning? can't you have been ballooning? can't she have been ballooning? can't we have been ballooning? can't you have been ballooning? can't they have been ballooning?