English verb conjugation
CAN STAIN

Regular verb: stain - stained - stained

Affirmation

Simple form	V-ing form
I can stain you can stain he can stain we can stain you can stain they can stain	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	V-ing 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	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	V-ing form
I can't stain you can't stain he can't stain we can't stain you can't stain they can't stain	I can't be staining you can't be staining he can't be staining we can't be staining you can't be staining they can't be staining
Perfect	V-ing perfect
I can't have stained you can't have stained he can't have stained we can't have stained you can't have stained they can't have stained	I can't have been staining you can't have been staining he can't have been staining we can't have been staining you can't have been staining they can't have been staining

Interrogative form

Simple form	V-ing form
can I stain? can you stain? can he stain? can we stain? can you stain? can they stain?	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	V-ing 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?	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	V-ing form
can't I stain? can't you stain? can't he stain? can't we stain? can't you stain? can't they stain?	can't I be staining? can't you be staining? can't he be staining? can't we be staining? can't you be staining? can't they be staining?
Perfect	V-ing perfect
can't I have stained? can't you have stained? can't he have stained? can't we have stained? can't you have stained? can't they have stained?	can't I have been staining? can't you have been staining? can't he have been staining? can't we have been staining? can't you have been staining? can't they have been staining?