English verb conjugation
COULD INSHEATHE

Regular verb: insheathe - insheathed - insheathed

Affirmation

Simple form	V-ing form
I could insheathe you could insheathe he could insheathe we could insheathe you could insheathe they could insheathe	I could be insheathing you could be insheathing he could be insheathing we could be insheathing you could be insheathing they could be insheathing
Perfect	V-ing perfect
I could have insheathed you could have insheathed he could have insheathed we could have insheathed you could have insheathed they could have insheathed	I could have been insheathing you could have been insheathing he could have been insheathing we could have been insheathing you could have been insheathing they could have been insheathing

Negation

Simple form	V-ing form
I couldn't insheathe you couldn't insheathe he couldn't insheathe we couldn't insheathe you couldn't insheathe they couldn't insheathe	I couldn't be insheathing you couldn't be insheathing he couldn't be insheathing we couldn't be insheathing you couldn't be insheathing they couldn't be insheathing
Perfect	V-ing perfect
I couldn't have insheathed you couldn't have insheathed he couldn't have insheathed we couldn't have insheathed you couldn't have insheathed they couldn't have insheathed	I couldn't have been insheathing you couldn't have been insheathing he couldn't have been insheathing we couldn't have been insheathing you couldn't have been insheathing they couldn't have been insheathing

Interrogative form

Simple form	V-ing form
could I insheathe? could you insheathe? could he insheathe? could we insheathe? could you insheathe? could they insheathe?	could I be insheathing? could you be insheathing? could he be insheathing? could we be insheathing? could you be insheathing? could they be insheathing?
Perfect	V-ing perfect
could I have insheathed? could you have insheathed? could he have insheathed? could we have insheathed? could you have insheathed? could they have insheathed?	could I have been insheathing? could you have been insheathing? could he have been insheathing? could we have been insheathing? could you have been insheathing? could they have been insheathing?

Interro-negative form

Simple form	V-ing form
couldn't I insheathe? couldn't you insheathe? couldn't he insheathe? couldn't we insheathe? couldn't you insheathe? couldn't they insheathe?	couldn't I be insheathing? couldn't you be insheathing? couldn't he be insheathing? couldn't we be insheathing? couldn't you be insheathing? couldn't they be insheathing?
Perfect	V-ing perfect
couldn't I have insheathed? couldn't you have insheathed? couldn't he have insheathed? couldn't we have insheathed? couldn't you have insheathed? couldn't they have insheathed?	couldn't I have been insheathing? couldn't you have been insheathing? couldn't he have been insheathing? couldn't we have been insheathing? couldn't you have been insheathing? couldn't they have been insheathing?