My freshmen recently turned in their first assignment of the semester, cooked up by
felixwas: If they were a mark of punctuation or a part of speech, what would they be and why? The assignment reminded me of this comment by Ulysses S. Grant, which he made a month or so before he finally died of painful throat cancer:
"The fact is I think I am a verb instead of a personal pronoun. A verb is anything that signifies to be; to do; or to suffer. I signify all three."