English verb conjugation
COULD HALLMARK

Regular verb: hallmark - hallmarked - hallmarked

Affirmation

Simple form	V-ing form
I could hallmark you could hallmark he could hallmark we could hallmark you could hallmark they could hallmark	I could be hallmarking you could be hallmarking he could be hallmarking we could be hallmarking you could be hallmarking they could be hallmarking
Perfect	V-ing perfect
I could have hallmarked you could have hallmarked he could have hallmarked we could have hallmarked you could have hallmarked they could have hallmarked	I could have been hallmarking you could have been hallmarking he could have been hallmarking we could have been hallmarking you could have been hallmarking they could have been hallmarking

Negation

Simple form	V-ing form
I couldn't hallmark you couldn't hallmark he couldn't hallmark we couldn't hallmark you couldn't hallmark they couldn't hallmark	I couldn't be hallmarking you couldn't be hallmarking he couldn't be hallmarking we couldn't be hallmarking you couldn't be hallmarking they couldn't be hallmarking
Perfect	V-ing perfect
I couldn't have hallmarked you couldn't have hallmarked he couldn't have hallmarked we couldn't have hallmarked you couldn't have hallmarked they couldn't have hallmarked	I couldn't have been hallmarking you couldn't have been hallmarking he couldn't have been hallmarking we couldn't have been hallmarking you couldn't have been hallmarking they couldn't have been hallmarking

Interrogative form

Simple form	V-ing form
could I hallmark? could you hallmark? could he hallmark? could we hallmark? could you hallmark? could they hallmark?	could I be hallmarking? could you be hallmarking? could he be hallmarking? could we be hallmarking? could you be hallmarking? could they be hallmarking?
Perfect	V-ing perfect
could I have hallmarked? could you have hallmarked? could he have hallmarked? could we have hallmarked? could you have hallmarked? could they have hallmarked?	could I have been hallmarking? could you have been hallmarking? could he have been hallmarking? could we have been hallmarking? could you have been hallmarking? could they have been hallmarking?

Interro-negative form

Simple form	V-ing form
couldn't I hallmark? couldn't you hallmark? couldn't he hallmark? couldn't we hallmark? couldn't you hallmark? couldn't they hallmark?	couldn't I be hallmarking? couldn't you be hallmarking? couldn't he be hallmarking? couldn't we be hallmarking? couldn't you be hallmarking? couldn't they be hallmarking?
Perfect	V-ing perfect
couldn't I have hallmarked? couldn't you have hallmarked? couldn't he have hallmarked? couldn't we have hallmarked? couldn't you have hallmarked? couldn't they have hallmarked?	couldn't I have been hallmarking? couldn't you have been hallmarking? couldn't he have been hallmarking? couldn't we have been hallmarking? couldn't you have been hallmarking? couldn't they have been hallmarking?