English verb conjugation
COULD SPACEWALK

Regular verb: spacewalk - spacewalked - spacewalked

Affirmation

Simple form	V-ing form
I could spacewalk you could spacewalk she could spacewalk we could spacewalk you could spacewalk they could spacewalk	I could be spacewalking you could be spacewalking she could be spacewalking we could be spacewalking you could be spacewalking they could be spacewalking
Perfect	V-ing perfect
I could have spacewalked you could have spacewalked she could have spacewalked we could have spacewalked you could have spacewalked they could have spacewalked	I could have been spacewalking you could have been spacewalking she could have been spacewalking we could have been spacewalking you could have been spacewalking they could have been spacewalking

Negation

Simple form	V-ing form
I could not spacewalk you could not spacewalk she could not spacewalk we could not spacewalk you could not spacewalk they could not spacewalk	I could not be spacewalking you could not be spacewalking she could not be spacewalking we could not be spacewalking you could not be spacewalking they could not be spacewalking
Perfect	V-ing perfect
I could not have spacewalked you could not have spacewalked she could not have spacewalked we could not have spacewalked you could not have spacewalked they could not have spacewalked	I could not have been spacewalking you could not have been spacewalking she could not have been spacewalking we could not have been spacewalking you could not have been spacewalking they could not have been spacewalking

Interrogative form

Simple form	V-ing form
could I spacewalk? could you spacewalk? could she spacewalk? could we spacewalk? could you spacewalk? could they spacewalk?	could I be spacewalking? could you be spacewalking? could she be spacewalking? could we be spacewalking? could you be spacewalking? could they be spacewalking?
Perfect	V-ing perfect
could I have spacewalked? could you have spacewalked? could she have spacewalked? could we have spacewalked? could you have spacewalked? could they have spacewalked?	could I have been spacewalking? could you have been spacewalking? could she have been spacewalking? could we have been spacewalking? could you have been spacewalking? could they have been spacewalking?

Interro-negative form

Simple form	V-ing form
could I not spacewalk? could you not spacewalk? could she not spacewalk? could we not spacewalk? could you not spacewalk? could they not spacewalk?	could I not be spacewalking? could you not be spacewalking? could she not be spacewalking? could we not be spacewalking? could you not be spacewalking? could they not be spacewalking?
Perfect	V-ing perfect
could I not have spacewalked? could you not have spacewalked? could she not have spacewalked? could we not have spacewalked? could you not have spacewalked? could they not have spacewalked?	could I not have been spacewalking? could you not have been spacewalking? could she not have been spacewalking? could we not have been spacewalking? could you not have been spacewalking? could they not have been spacewalking?