I can stain you can stain he can stain we can stain you can stain they can stain
V-ing form
I can be staining you can be staining he can be staining we can be staining you can be staining they can be staining
Perfect
I can have stained you can have stained he can have stained we can have stained you can have stained they can have stained
V-ing perfect
I can have been staining you can have been staining he can have been staining we can have been staining you can have been staining they can have been staining
Negation
Simple form
I cannot stain you cannot stain he cannot stain we cannot stain you cannot stain they cannot stain
V-ing form
I cannot be staining you cannot be staining he cannot be staining we cannot be staining you cannot be staining they cannot be staining
Perfect
I cannot have stained you cannot have stained he cannot have stained we cannot have stained you cannot have stained they cannot have stained
V-ing perfect
I cannot have been staining you cannot have been staining he cannot have been staining we cannot have been staining you cannot have been staining they cannot have been staining
Interrogative form
Simple form
can I stain? can you stain? can he stain? can we stain? can you stain? can they stain?
V-ing form
can I be staining? can you be staining? can he be staining? can we be staining? can you be staining? can they be staining?
Perfect
can I have stained? can you have stained? can he have stained? can we have stained? can you have stained? can they have stained?
V-ing perfect
can I have been staining? can you have been staining? can he have been staining? can we have been staining? can you have been staining? can they have been staining?
Interro-negative form
Simple form
can I not stain? can you not stain? can he not stain? can we not stain? can you not stain? can they not stain?
V-ing form
can I not be staining? can you not be staining? can he not be staining? can we not be staining? can you not be staining? can they not be staining?
Perfect
can I not have stained? can you not have stained? can he not have stained? can we not have stained? can you not have stained? can they not have stained?
V-ing perfect
can I not have been staining? can you not have been staining? can he not have been staining? can we not have been staining? can you not have been staining? can they not have been staining?