I can balloon you can balloon he can balloon we can balloon you can balloon they can balloon
V-ing form
I can be ballooning you can be ballooning he can be ballooning we can be ballooning you can be ballooning they can be ballooning
Perfect
I can have ballooned you can have ballooned he 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 he can have been ballooning we can have been ballooning you can have been ballooning they can have been ballooning
Negation
Simple form
I cannot balloon you cannot balloon he cannot balloon we cannot balloon you cannot balloon they cannot balloon
V-ing form
I cannot be ballooning you cannot be ballooning he cannot be ballooning we cannot be ballooning you cannot be ballooning they cannot be ballooning
Perfect
I cannot have ballooned you cannot have ballooned he cannot have ballooned we cannot have ballooned you cannot have ballooned they cannot have ballooned
V-ing perfect
I cannot have been ballooning you cannot have been ballooning he cannot have been ballooning we cannot have been ballooning you cannot have been ballooning they cannot have been ballooning
Interrogative form
Simple form
can I balloon? can you balloon? can he balloon? can we balloon? can you balloon? can they balloon?
V-ing form
can I be ballooning? can you be ballooning? can he be ballooning? can we be ballooning? can you be ballooning? can they be ballooning?
Perfect
can I have ballooned? can you have ballooned? can he 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 he have been ballooning? can we have been ballooning? can you have been ballooning? can they have been ballooning?
Interro-negative form
Simple form
can I not balloon? can you not balloon? can he not balloon? can we not balloon? can you not balloon? can they not balloon?
V-ing form
can I not be ballooning? can you not be ballooning? can he not be ballooning? can we not be ballooning? can you not be ballooning? can they not be ballooning?
Perfect
can I not have ballooned? can you not have ballooned? can he not have ballooned? can we not have ballooned? can you not have ballooned? can they not have ballooned?
V-ing perfect
can I not have been ballooning? can you not have been ballooning? can he not have been ballooning? can we not have been ballooning? can you not have been ballooning? can they not have been ballooning?