no
I need to add quotation marks in that sentence
Quotation marks are used for direct quotes only. Indirect quotes are paraphrased and do not need quotation marks.
Well, it doesn't need quotation marks but it does have to be capitalized and it has to be in italics. If it's a name of the article in a magazine, then you have to underline it too. That's what I think.
Not necessarily, but the use of quotation marks around any expression of lesser quality may be a signal to the reader that the writer is aware of doing it, and not simply failing to know any better.
no only quotes
Yes.
Typically, if the words are your own you do not need to enclose them in quotation marks. However, if you specifically mean the words to be understood as dialogue, you should put quotation marks around them.
Use single quotation marks to indicate a quote within a quote.If you're using a quote that contains a quote you'll need to surround the embedded quote with single quotation marks.
( ) are parenthesis. You never put a title between those. Sometimes you would use quotation marks " " . But usually a title is underlined. No it needs to be in quatation marks.
Yes. Anytime you are using someone else's words in your own writing, you must use quotation marks to indicate so.
If someone is saying it... "Hi," John said.
You would not need to use quotation marks or need to underline Petronella. It is her name.