I can spall you can spall he can spall we can spall you can spall they can spall
V-ing form
I can be spalling you can be spalling he can be spalling we can be spalling you can be spalling they can be spalling
Perfect
I can have spalled you can have spalled he can have spalled we can have spalled you can have spalled they can have spalled
V-ing perfect
I can have been spalling you can have been spalling he can have been spalling we can have been spalling you can have been spalling they can have been spalling
Negation
Simple form
I cannot spall you cannot spall he cannot spall we cannot spall you cannot spall they cannot spall
V-ing form
I cannot be spalling you cannot be spalling he cannot be spalling we cannot be spalling you cannot be spalling they cannot be spalling
Perfect
I cannot have spalled you cannot have spalled he cannot have spalled we cannot have spalled you cannot have spalled they cannot have spalled
V-ing perfect
I cannot have been spalling you cannot have been spalling he cannot have been spalling we cannot have been spalling you cannot have been spalling they cannot have been spalling
Interrogative form
Simple form
can I spall? can you spall? can he spall? can we spall? can you spall? can they spall?
V-ing form
can I be spalling? can you be spalling? can he be spalling? can we be spalling? can you be spalling? can they be spalling?
Perfect
can I have spalled? can you have spalled? can he have spalled? can we have spalled? can you have spalled? can they have spalled?
V-ing perfect
can I have been spalling? can you have been spalling? can he have been spalling? can we have been spalling? can you have been spalling? can they have been spalling?
Interro-negative form
Simple form
can I not spall? can you not spall? can he not spall? can we not spall? can you not spall? can they not spall?
V-ing form
can I not be spalling? can you not be spalling? can he not be spalling? can we not be spalling? can you not be spalling? can they not be spalling?
Perfect
can I not have spalled? can you not have spalled? can he not have spalled? can we not have spalled? can you not have spalled? can they not have spalled?
V-ing perfect
can I not have been spalling? can you not have been spalling? can he not have been spalling? can we not have been spalling? can you not have been spalling? can they not have been spalling?