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 couldn't spacewalk
you couldn't spacewalk
she couldn't spacewalk
we couldn't spacewalk
you couldn't spacewalk
they couldn't spacewalk 	I couldn't be spacewalking
you couldn't be spacewalking
she couldn't be spacewalking
we couldn't be spacewalking
you couldn't be spacewalking
they couldn't be spacewalking	I couldn't have spacewalked
you couldn't have spacewalked
she couldn't have spacewalked
we couldn't have spacewalked
you couldn't have spacewalked
they couldn't have spacewalked	I couldn't have been spacewalking
you couldn't have been spacewalking
she couldn't have been spacewalking
we couldn't have been spacewalking
you couldn't have been spacewalking
they couldn't 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 	
couldn't I spacewalk?
couldn't you spacewalk?
couldn't she spacewalk?
couldn't we spacewalk?
couldn't you spacewalk?
couldn't they spacewalk? 	couldn't I be spacewalking?
couldn't you be spacewalking?
couldn't she be spacewalking?
couldn't we be spacewalking?
couldn't you be spacewalking?
couldn't they be spacewalking? 	couldn't I have spacewalked?
couldn't you have spacewalked?
couldn't she have spacewalked?
couldn't we have spacewalked?
couldn't you have spacewalked?
couldn't they have spacewalked? 	couldn't I have been spacewalking?
couldn't you have been spacewalking?
couldn't she have been spacewalking?
couldn't we have been spacewalking?
couldn't you have been spacewalking?
couldn't they have been spacewalking?