English verb conjugation
CAN HALLMARK

Regular verb: hallmark - hallmarked - hallmarked

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can I not hallmark? can you not hallmark? can he not hallmark? can we not hallmark? can you not hallmark? can they not hallmark?	can I not be hallmarking? can you not be hallmarking? can he not be hallmarking? can we not be hallmarking? can you not be hallmarking? can they not be hallmarking?
Perfect	V-ing perfect
can I not have hallmarked? can you not have hallmarked? can he not have hallmarked? can we not have hallmarked? can you not have hallmarked? can they not have hallmarked?	can I not have been hallmarking? can you not have been hallmarking? can he not have been hallmarking? can we not have been hallmarking? can you not have been hallmarking? can they not have been hallmarking?