I can overflow you can overflow he can overflow we can overflow you can overflow they can overflow
V-ing form
I can be overflowing you can be overflowing he can be overflowing we can be overflowing you can be overflowing they can be overflowing
Perfect
I can have overflowed you can have overflowed he can have overflowed we can have overflowed you can have overflowed they can have overflowed
V-ing perfect
I can have been overflowing you can have been overflowing he can have been overflowing we can have been overflowing you can have been overflowing they can have been overflowing
Negation
Simple form
I can't overflow you can't overflow he can't overflow we can't overflow you can't overflow they can't overflow
V-ing form
I can't be overflowing you can't be overflowing he can't be overflowing we can't be overflowing you can't be overflowing they can't be overflowing
Perfect
I can't have overflowed you can't have overflowed he can't have overflowed we can't have overflowed you can't have overflowed they can't have overflowed
V-ing perfect
I can't have been overflowing you can't have been overflowing he can't have been overflowing we can't have been overflowing you can't have been overflowing they can't have been overflowing
Interrogative form
Simple form
can I overflow? can you overflow? can he overflow? can we overflow? can you overflow? can they overflow?
V-ing form
can I be overflowing? can you be overflowing? can he be overflowing? can we be overflowing? can you be overflowing? can they be overflowing?
Perfect
can I have overflowed? can you have overflowed? can he have overflowed? can we have overflowed? can you have overflowed? can they have overflowed?
V-ing perfect
can I have been overflowing? can you have been overflowing? can he have been overflowing? can we have been overflowing? can you have been overflowing? can they have been overflowing?
Interro-negative form
Simple form
can't I overflow? can't you overflow? can't he overflow? can't we overflow? can't you overflow? can't they overflow?
V-ing form
can't I be overflowing? can't you be overflowing? can't he be overflowing? can't we be overflowing? can't you be overflowing? can't they be overflowing?
Perfect
can't I have overflowed? can't you have overflowed? can't he have overflowed? can't we have overflowed? can't you have overflowed? can't they have overflowed?
V-ing perfect
can't I have been overflowing? can't you have been overflowing? can't he have been overflowing? can't we have been overflowing? can't you have been overflowing? can't they have been overflowing?