could spacewalk
Regular verb: spacewalk - spacewalked- spacewalked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?