English verb conjugation
CAN SKULK

Regular verb: skulk - skulked - skulked

Affirmation

Simple form	V-ing form
I can skulk you can skulk he can skulk we can skulk you can skulk they can skulk	I can be skulking you can be skulking he can be skulking we can be skulking you can be skulking they can be skulking
Perfect	V-ing perfect
I can have skulked you can have skulked he can have skulked we can have skulked you can have skulked they can have skulked	I can have been skulking you can have been skulking he can have been skulking we can have been skulking you can have been skulking they can have been skulking

Negation

Simple form	V-ing form
I cannot skulk you cannot skulk he cannot skulk we cannot skulk you cannot skulk they cannot skulk	I cannot be skulking you cannot be skulking he cannot be skulking we cannot be skulking you cannot be skulking they cannot be skulking
Perfect	V-ing perfect
I cannot have skulked you cannot have skulked he cannot have skulked we cannot have skulked you cannot have skulked they cannot have skulked	I cannot have been skulking you cannot have been skulking he cannot have been skulking we cannot have been skulking you cannot have been skulking they cannot have been skulking

Interrogative form

Simple form	V-ing form
can I skulk? can you skulk? can he skulk? can we skulk? can you skulk? can they skulk?	can I be skulking? can you be skulking? can he be skulking? can we be skulking? can you be skulking? can they be skulking?
Perfect	V-ing perfect
can I have skulked? can you have skulked? can he have skulked? can we have skulked? can you have skulked? can they have skulked?	can I have been skulking? can you have been skulking? can he have been skulking? can we have been skulking? can you have been skulking? can they have been skulking?

Interro-negative form

Simple form	V-ing form
can I not skulk? can you not skulk? can he not skulk? can we not skulk? can you not skulk? can they not skulk?	can I not be skulking? can you not be skulking? can he not be skulking? can we not be skulking? can you not be skulking? can they not be skulking?
Perfect	V-ing perfect
can I not have skulked? can you not have skulked? can he not have skulked? can we not have skulked? can you not have skulked? can they not have skulked?	can I not have been skulking? can you not have been skulking? can he not have been skulking? can we not have been skulking? can you not have been skulking? can they not have been skulking?