English verb conjugation
COULD UNSHEATHE

Regular verb: unsheathe - unsheathed - unsheathed

Affirmation

Simple form	V-ing form
I could unsheathe you could unsheathe she could unsheathe we could unsheathe you could unsheathe they could unsheathe	I could be unsheathing you could be unsheathing she could be unsheathing we could be unsheathing you could be unsheathing they could be unsheathing
Perfect	V-ing perfect
I could have unsheathed you could have unsheathed she could have unsheathed we could have unsheathed you could have unsheathed they could have unsheathed	I could have been unsheathing you could have been unsheathing she could have been unsheathing we could have been unsheathing you could have been unsheathing they could have been unsheathing

Negation

Simple form	V-ing form
I could not unsheathe you could not unsheathe she could not unsheathe we could not unsheathe you could not unsheathe they could not unsheathe	I could not be unsheathing you could not be unsheathing she could not be unsheathing we could not be unsheathing you could not be unsheathing they could not be unsheathing
Perfect	V-ing perfect
I could not have unsheathed you could not have unsheathed she could not have unsheathed we could not have unsheathed you could not have unsheathed they could not have unsheathed	I could not have been unsheathing you could not have been unsheathing she could not have been unsheathing we could not have been unsheathing you could not have been unsheathing they could not have been unsheathing

Interrogative form

Simple form	V-ing form
could I unsheathe? could you unsheathe? could she unsheathe? could we unsheathe? could you unsheathe? could they unsheathe?	could I be unsheathing? could you be unsheathing? could she be unsheathing? could we be unsheathing? could you be unsheathing? could they be unsheathing?
Perfect	V-ing perfect
could I have unsheathed? could you have unsheathed? could she have unsheathed? could we have unsheathed? could you have unsheathed? could they have unsheathed?	could I have been unsheathing? could you have been unsheathing? could she have been unsheathing? could we have been unsheathing? could you have been unsheathing? could they have been unsheathing?

Interro-negative form

Simple form	V-ing form
could I not unsheathe? could you not unsheathe? could she not unsheathe? could we not unsheathe? could you not unsheathe? could they not unsheathe?	could I not be unsheathing? could you not be unsheathing? could she not be unsheathing? could we not be unsheathing? could you not be unsheathing? could they not be unsheathing?
Perfect	V-ing perfect
could I not have unsheathed? could you not have unsheathed? could she not have unsheathed? could we not have unsheathed? could you not have unsheathed? could they not have unsheathed?	could I not have been unsheathing? could you not have been unsheathing? could she not have been unsheathing? could we not have been unsheathing? could you not have been unsheathing? could they not have been unsheathing?