English verb conjugation
COULD SLEEPWALK

Regular verb: sleepwalk - sleepwalked - sleepwalked

Affirmation

Simple form	V-ing form
I could sleepwalk you could sleepwalk he could sleepwalk we could sleepwalk you could sleepwalk they could sleepwalk	I could be sleepwalking you could be sleepwalking he could be sleepwalking we could be sleepwalking you could be sleepwalking they could be sleepwalking
Perfect	V-ing perfect
I could have sleepwalked you could have sleepwalked he could have sleepwalked we could have sleepwalked you could have sleepwalked they could have sleepwalked	I could have been sleepwalking you could have been sleepwalking he could have been sleepwalking we could have been sleepwalking you could have been sleepwalking they could have been sleepwalking

Negation

Simple form	V-ing form
I could not sleepwalk you could not sleepwalk he could not sleepwalk we could not sleepwalk you could not sleepwalk they could not sleepwalk	I could not be sleepwalking you could not be sleepwalking he could not be sleepwalking we could not be sleepwalking you could not be sleepwalking they could not be sleepwalking
Perfect	V-ing perfect
I could not have sleepwalked you could not have sleepwalked he could not have sleepwalked we could not have sleepwalked you could not have sleepwalked they could not have sleepwalked	I could not have been sleepwalking you could not have been sleepwalking he could not have been sleepwalking we could not have been sleepwalking you could not have been sleepwalking they could not have been sleepwalking

Interrogative form

Simple form	V-ing form
could I sleepwalk? could you sleepwalk? could he sleepwalk? could we sleepwalk? could you sleepwalk? could they sleepwalk?	could I be sleepwalking? could you be sleepwalking? could he be sleepwalking? could we be sleepwalking? could you be sleepwalking? could they be sleepwalking?
Perfect	V-ing perfect
could I have sleepwalked? could you have sleepwalked? could he have sleepwalked? could we have sleepwalked? could you have sleepwalked? could they have sleepwalked?	could I have been sleepwalking? could you have been sleepwalking? could he have been sleepwalking? could we have been sleepwalking? could you have been sleepwalking? could they have been sleepwalking?

Interro-negative form

Simple form	V-ing form
could I not sleepwalk? could you not sleepwalk? could he not sleepwalk? could we not sleepwalk? could you not sleepwalk? could they not sleepwalk?	could I not be sleepwalking? could you not be sleepwalking? could he not be sleepwalking? could we not be sleepwalking? could you not be sleepwalking? could they not be sleepwalking?
Perfect	V-ing perfect
could I not have sleepwalked? could you not have sleepwalked? could he not have sleepwalked? could we not have sleepwalked? could you not have sleepwalked? could they not have sleepwalked?	could I not have been sleepwalking? could you not have been sleepwalking? could he not have been sleepwalking? could we not have been sleepwalking? could you not have been sleepwalking? could they not have been sleepwalking?