English verb conjugation
CAN SPACEWALK

Regular verb: spacewalk - spacewalked - spacewalked

Affirmation

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

Negation

Simple form	V-ing form
I cannot spacewalk you cannot spacewalk he cannot spacewalk we cannot spacewalk you cannot spacewalk they cannot spacewalk	I cannot be spacewalking you cannot be spacewalking he cannot be spacewalking we cannot be spacewalking you cannot be spacewalking they cannot be spacewalking
Perfect	V-ing perfect
I cannot have spacewalked you cannot have spacewalked he cannot have spacewalked we cannot have spacewalked you cannot have spacewalked they cannot have spacewalked	I cannot have been spacewalking you cannot have been spacewalking he cannot have been spacewalking we cannot have been spacewalking you cannot have been spacewalking they cannot have been spacewalking

Interrogative form

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

Interro-negative form

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