Whenever citing a quote or marking something that someone said.
Quotation marks are used for direct quotes only. Indirect quotes are paraphrased and do not need quotation marks.
In APA style, use double quotation marks to enclose direct quotes from sources. Place the punctuation inside the quotation marks. Use single quotation marks for quotes within quotes.
No, you do not need to use quotation marks for your own quotes in writing. It is understood that the words within the quotes are being attributed to you as the author.
Double quotation marks are typically used to indicate direct speech or dialogue in writing. They are also used to enclose the titles of short works, like articles, poems, or short stories. In American English, double quotation marks are preferred for direct speech, while single quotation marks are used for quotes within quotes.
You do punctuate 3 or more consecutive direct quotes with quotation marks AND commas. I am an English scholar, so believe me when I say this! LMJ
Quotation marks should be placed around any quotes. In other words, any text that you have copied from elsewhere.
For direct quotes, use the quotation marks ".
In academic writing using Chicago style, place quotation marks around direct quotes and titles of shorter works like articles or chapters. Use double quotation marks for the main quote and single quotation marks for quotes within the main quote.
Direct quotes (exact words that were spoken or written) OR words used ironically
No. A direct quote is words from another author (besides yourself) that are copied verbatim. This always needs quotes. Paraphrasing does not need quotes. Paraphrasing is when you restate the author's ideas in your own words. However, paraphrases sometimes incorporate direct quotes and these will need to be enclosed in quotation marks. The source should be acknowledged. A paraphrase is not a direct quote and does not require quotation marks. You do, however need to give credit to its author through correct citation.
There is no reason that h2co3 should be written inside of single quotation marks according to chemistry style guides. Single quotes are used for quotes within double quotation marks.
No. Use quotation marks.