I can hollow you can hollow she can hollow we can hollow you can hollow they can hollow
V-ing form
I can be hollowing you can be hollowing she can be hollowing we can be hollowing you can be hollowing they can be hollowing
Perfect
I can have hollowed you can have hollowed she can have hollowed we can have hollowed you can have hollowed they can have hollowed
V-ing perfect
I can have been hollowing you can have been hollowing she can have been hollowing we can have been hollowing you can have been hollowing they can have been hollowing
Negation
Simple form
I cannot hollow you cannot hollow she cannot hollow we cannot hollow you cannot hollow they cannot hollow
V-ing form
I cannot be hollowing you cannot be hollowing she cannot be hollowing we cannot be hollowing you cannot be hollowing they cannot be hollowing
Perfect
I cannot have hollowed you cannot have hollowed she cannot have hollowed we cannot have hollowed you cannot have hollowed they cannot have hollowed
V-ing perfect
I cannot have been hollowing you cannot have been hollowing she cannot have been hollowing we cannot have been hollowing you cannot have been hollowing they cannot have been hollowing
Interrogative form
Simple form
can I hollow? can you hollow? can she hollow? can we hollow? can you hollow? can they hollow?
V-ing form
can I be hollowing? can you be hollowing? can she be hollowing? can we be hollowing? can you be hollowing? can they be hollowing?
Perfect
can I have hollowed? can you have hollowed? can she have hollowed? can we have hollowed? can you have hollowed? can they have hollowed?
V-ing perfect
can I have been hollowing? can you have been hollowing? can she have been hollowing? can we have been hollowing? can you have been hollowing? can they have been hollowing?
Interro-negative form
Simple form
can I not hollow? can you not hollow? can she not hollow? can we not hollow? can you not hollow? can they not hollow?
V-ing form
can I not be hollowing? can you not be hollowing? can she not be hollowing? can we not be hollowing? can you not be hollowing? can they not be hollowing?
Perfect
can I not have hollowed? can you not have hollowed? can she not have hollowed? can we not have hollowed? can you not have hollowed? can they not have hollowed?
V-ing perfect
can I not have been hollowing? can you not have been hollowing? can she not have been hollowing? can we not have been hollowing? can you not have been hollowing? can they not have been hollowing?