English verb conjugation
COULD DUNK

Regular verb: dunk - dunked - dunked

Affirmation

Simple form	V-ing form
I could dunk you could dunk he could dunk we could dunk you could dunk they could dunk	I could be dunking you could be dunking he could be dunking we could be dunking you could be dunking they could be dunking
Perfect	V-ing perfect
I could have dunked you could have dunked he could have dunked we could have dunked you could have dunked they could have dunked	I could have been dunking you could have been dunking he could have been dunking we could have been dunking you could have been dunking they could have been dunking

Negation

Simple form	V-ing form
I couldn't dunk you couldn't dunk he couldn't dunk we couldn't dunk you couldn't dunk they couldn't dunk	I couldn't be dunking you couldn't be dunking he couldn't be dunking we couldn't be dunking you couldn't be dunking they couldn't be dunking
Perfect	V-ing perfect
I couldn't have dunked you couldn't have dunked he couldn't have dunked we couldn't have dunked you couldn't have dunked they couldn't have dunked	I couldn't have been dunking you couldn't have been dunking he couldn't have been dunking we couldn't have been dunking you couldn't have been dunking they couldn't have been dunking

Interrogative form

Simple form	V-ing form
could I dunk? could you dunk? could he dunk? could we dunk? could you dunk? could they dunk?	could I be dunking? could you be dunking? could he be dunking? could we be dunking? could you be dunking? could they be dunking?
Perfect	V-ing perfect
could I have dunked? could you have dunked? could he have dunked? could we have dunked? could you have dunked? could they have dunked?	could I have been dunking? could you have been dunking? could he have been dunking? could we have been dunking? could you have been dunking? could they have been dunking?

Interro-negative form

Simple form	V-ing form
couldn't I dunk? couldn't you dunk? couldn't he dunk? couldn't we dunk? couldn't you dunk? couldn't they dunk?	couldn't I be dunking? couldn't you be dunking? couldn't he be dunking? couldn't we be dunking? couldn't you be dunking? couldn't they be dunking?
Perfect	V-ing perfect
couldn't I have dunked? couldn't you have dunked? couldn't he have dunked? couldn't we have dunked? couldn't you have dunked? couldn't they have dunked?	couldn't I have been dunking? couldn't you have been dunking? couldn't he have been dunking? couldn't we have been dunking? couldn't you have been dunking? couldn't they have been dunking?