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