English verb conjugation
COULD SHIRK

Regular verb: shirk - shirked - shirked

Affirmation

Simple form	V-ing form
I could shirk you could shirk he could shirk we could shirk you could shirk they could shirk	I could be shirking you could be shirking he could be shirking we could be shirking you could be shirking they could be shirking
Perfect	V-ing perfect
I could have shirked you could have shirked he could have shirked we could have shirked you could have shirked they could have shirked	I could have been shirking you could have been shirking he could have been shirking we could have been shirking you could have been shirking they could have been shirking

Negation

Simple form	V-ing form
I couldn't shirk you couldn't shirk he couldn't shirk we couldn't shirk you couldn't shirk they couldn't shirk	I couldn't be shirking you couldn't be shirking he couldn't be shirking we couldn't be shirking you couldn't be shirking they couldn't be shirking
Perfect	V-ing perfect
I couldn't have shirked you couldn't have shirked he couldn't have shirked we couldn't have shirked you couldn't have shirked they couldn't have shirked	I couldn't have been shirking you couldn't have been shirking he couldn't have been shirking we couldn't have been shirking you couldn't have been shirking they couldn't have been shirking

Interrogative form

Simple form	V-ing form
could I shirk? could you shirk? could he shirk? could we shirk? could you shirk? could they shirk?	could I be shirking? could you be shirking? could he be shirking? could we be shirking? could you be shirking? could they be shirking?
Perfect	V-ing perfect
could I have shirked? could you have shirked? could he have shirked? could we have shirked? could you have shirked? could they have shirked?	could I have been shirking? could you have been shirking? could he have been shirking? could we have been shirking? could you have been shirking? could they have been shirking?

Interro-negative form

Simple form	V-ing form
couldn't I shirk? couldn't you shirk? couldn't he shirk? couldn't we shirk? couldn't you shirk? couldn't they shirk?	couldn't I be shirking? couldn't you be shirking? couldn't he be shirking? couldn't we be shirking? couldn't you be shirking? couldn't they be shirking?
Perfect	V-ing perfect
couldn't I have shirked? couldn't you have shirked? couldn't he have shirked? couldn't we have shirked? couldn't you have shirked? couldn't they have shirked?	couldn't I have been shirking? couldn't you have been shirking? couldn't he have been shirking? couldn't we have been shirking? couldn't you have been shirking? couldn't they have been shirking?