English verb conjugation
CAN SHEATHE

Regular verb: sheathe - sheathed - sheathed

Affirmation

Simple form	V-ing form
I can sheathe you can sheathe he can sheathe we can sheathe you can sheathe they can sheathe	I can be sheathing you can be sheathing he can be sheathing we can be sheathing you can be sheathing they can be sheathing
Perfect	V-ing perfect
I can have sheathed you can have sheathed he can have sheathed we can have sheathed you can have sheathed they can have sheathed	I can have been sheathing you can have been sheathing he can have been sheathing we can have been sheathing you can have been sheathing they can have been sheathing

Negation

Simple form	V-ing form
I cannot sheathe you cannot sheathe he cannot sheathe we cannot sheathe you cannot sheathe they cannot sheathe	I cannot be sheathing you cannot be sheathing he cannot be sheathing we cannot be sheathing you cannot be sheathing they cannot be sheathing
Perfect	V-ing perfect
I cannot have sheathed you cannot have sheathed he cannot have sheathed we cannot have sheathed you cannot have sheathed they cannot have sheathed	I cannot have been sheathing you cannot have been sheathing he cannot have been sheathing we cannot have been sheathing you cannot have been sheathing they cannot have been sheathing

Interrogative form

Simple form	V-ing form
can I sheathe? can you sheathe? can he sheathe? can we sheathe? can you sheathe? can they sheathe?	can I be sheathing? can you be sheathing? can he be sheathing? can we be sheathing? can you be sheathing? can they be sheathing?
Perfect	V-ing perfect
can I have sheathed? can you have sheathed? can he have sheathed? can we have sheathed? can you have sheathed? can they have sheathed?	can I have been sheathing? can you have been sheathing? can he have been sheathing? can we have been sheathing? can you have been sheathing? can they have been sheathing?

Interro-negative form

Simple form	V-ing form
can I not sheathe? can you not sheathe? can he not sheathe? can we not sheathe? can you not sheathe? can they not sheathe?	can I not be sheathing? can you not be sheathing? can he not be sheathing? can we not be sheathing? can you not be sheathing? can they not be sheathing?
Perfect	V-ing perfect
can I not have sheathed? can you not have sheathed? can he not have sheathed? can we not have sheathed? can you not have sheathed? can they not have sheathed?	can I not have been sheathing? can you not have been sheathing? can he not have been sheathing? can we not have been sheathing? can you not have been sheathing? can they not have been sheathing?