Modern style guides (APA, MLA, Chicago, etc.) don't underline anything--instead they use italics. If, however, you teacher requires you to use underlining, or if you're writing an essay by hand (like on a test), then yes, titles of plays are underlined, just like books and movies.
No, you underline Novels and books
Following the model "Novel = underlined/italicized Short story = quotation marks," short films require quotation marks.
Yes, A novella should be treated just like a novel. The term novella is only a variant of the term novel, thus it should be treated the same.
Before we had italics, it had to be quotation marks, but now, I think italics is sufficient, particularly if you are referring to it as a source. Maybe different rules for published treatises.
If you're typing the essay out, then you italicize it and nothing else. But if you're hand-writing the essay, then you underline it. In either case, do not use quotation marks.
Yes, it is common practice to use quotation marks when mentioning the title of a novel in a sentence to indicate that it is a specific work of literature. Example: "To Kill a Mockingbird" is a classic novel by Harper Lee.
Yes, the names of short stories should go in quotation marks. The general rule is that lengthier, stand-alone works, such as novels and plays, should be underlined or italicized, while shorter works, such as short stories (what I'm assuming you're referring to) and most poems should be placed in quotation marks.
It is underlined under MLA rules or in italics under the APA rules, but never in qoutation marks. Quotation marks are used for quoting text from books, short story titles, articles in periodicals or reference works, etc.
Whenever possible, italicize novel titles. Otherwise, underline them.
thats simple. you use quotations in essays when you are stating a point and you need to back it up with proof. for example if your doing an essay on a novel or play and you are stating a point, you say a certain quote of the the piece of writing your doing the essay on and use the quote to BACK UP your answer. again if you're just using a random every day quote you like in your essay you use it if it of course has relevance to your essay topic and to back up a point you are stating
Sentences with quotation marks will look like this: I said, "Walk with me to the store." Sentences with a quote in them will look like this: According to Brian's first novel, "The weather was hot and humid that day."
Cather's quotation from her opening epigraph is echoed throughout Virgil.