Tham khảo tài liệu 'english for personal assistants - part 33', ngoại ngữ, kỹ năng viết tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 160 Appendix B Punctuation A good way to remember it is to say to yourself the . belonging to the . If they re the eyes belonging to the cat singular you would write the cat s eyes. If they re the eyes belonging to the cats plural you would write the cats eyes. If the person or people or cats doing the possessing already have an s on the end you don t add another one simply stick the apostrophe on the end - that s why you ve never seen anyone write the cats s eyes . The only times when you would add an s after a singular word that ends in s are If it s a proper name Mr Jones s St James s If the word ends in a double ss the boss s . You never use an apostrophe with a possessive pronoun a word indicating possession which replaces a noun . These are words like yours hers its theirs ours. It s and its A lot of people find these two words very confusing its is a possessive pronoun and therefore has no apostrophe while it s is short for it is and does have one. The easiest way to tell each time you write the word is to say it in your head as it is . If it makes sense it s short for it is and has an apostrophe. Otherwise it doesn t. For example I gave the dog its breakfast . Try the technique I gave the dog it is breakfast. Complete nonsense. It clearly isn t short for it is so it shouldn t have an apostrophe. Here s another example It s a great day to go swimming . Try the technique It is a great day to go swimming . That makes sense - it s short for it is so it does have an apostrophe in place of the missing i. Appendix C Proofreader s marks The following marks are standard proofreading marks. Only the most commonly used have been included. Depending on the content of your text you may need to use other symbols . superscript and subscript for formulas. A professional proofreader puts a mark in the line and writes the correction in the margin. An editor makes corrections within the line rather than in the margin in part because an editor s changes are typically more .
