English verb conjugation
COULD CAULK

Regular verb: caulk - caulked - caulked

Affirmation

Simple form	V-ing form
I could caulk you could caulk he could caulk we could caulk you could caulk they could caulk	I could be caulking you could be caulking he could be caulking we could be caulking you could be caulking they could be caulking
Perfect	V-ing perfect
I could have caulked you could have caulked he could have caulked we could have caulked you could have caulked they could have caulked	I could have been caulking you could have been caulking he could have been caulking we could have been caulking you could have been caulking they could have been caulking

Negation

Simple form	V-ing form
I couldn't caulk you couldn't caulk he couldn't caulk we couldn't caulk you couldn't caulk they couldn't caulk	I couldn't be caulking you couldn't be caulking he couldn't be caulking we couldn't be caulking you couldn't be caulking they couldn't be caulking
Perfect	V-ing perfect
I couldn't have caulked you couldn't have caulked he couldn't have caulked we couldn't have caulked you couldn't have caulked they couldn't have caulked	I couldn't have been caulking you couldn't have been caulking he couldn't have been caulking we couldn't have been caulking you couldn't have been caulking they couldn't have been caulking

Interrogative form

Simple form	V-ing form
could I caulk? could you caulk? could he caulk? could we caulk? could you caulk? could they caulk?	could I be caulking? could you be caulking? could he be caulking? could we be caulking? could you be caulking? could they be caulking?
Perfect	V-ing perfect
could I have caulked? could you have caulked? could he have caulked? could we have caulked? could you have caulked? could they have caulked?	could I have been caulking? could you have been caulking? could he have been caulking? could we have been caulking? could you have been caulking? could they have been caulking?

Interro-negative form

Simple form	V-ing form
couldn't I caulk? couldn't you caulk? couldn't he caulk? couldn't we caulk? couldn't you caulk? couldn't they caulk?	couldn't I be caulking? couldn't you be caulking? couldn't he be caulking? couldn't we be caulking? couldn't you be caulking? couldn't they be caulking?
Perfect	V-ing perfect
couldn't I have caulked? couldn't you have caulked? couldn't he have caulked? couldn't we have caulked? couldn't you have caulked? couldn't they have caulked?	couldn't I have been caulking? couldn't you have been caulking? couldn't he have been caulking? couldn't we have been caulking? couldn't you have been caulking? couldn't they have been caulking?