北京赛车pk10将输改赢 www.dfcfafa01.cn 学了这么多年英语，你真的会使用英文中的撇号吗？各种所有格和动词缩略语怎么写又是正确的呢？来看看知名英文学习视频博主Lucy怎么说。
The possessive case
The possessive case is used to show a relationship of belonging between one thing and another.
To form the possessive, an apostrophe and an 's' is added to the noun. For example, if a ball belongs to the dog it is the dog's ball.
However the rule becomes more complicated once it is applied to a noun ending in the letter 's'.
The same principle applies but some people might choose to remove the second 's'.
For example, to refer to the part played by the actress, it could be 'the actress's part' or 'the actress' part'.
比如，当指某位女演员表演的部分时，可以说是the actress's part或者the actress' part。
Some people are guided in whether or not to include the 's' by how the word is pronounced.
Lucy said the most important thing to do is to remain consistent in your style and to choose one form throughout a piece of text.
The rule is clearer with a plural noun as only an apostrophe should be added.
For example, the house belonging to your grandparents would be your 'grandparents' house', rather than 'your grandparents's house'.
比如，这间房子属于你的祖父母，应该写成your grandparents' house而不是your grandparents's house
If comparing two nouns with possessive pronouns, you don't always need to repeat the second noun but would still use the apostrophe.
For example, you don't need to say 'my house is smaller than my parents' house', and can instead just say 'my house is smaller than my parents'.'
比如，你不用说my house is smaller than my parents' house，而只要说my house is smaller than my parents'（我的房子比父母的房子?。?。
With nouns that have multiple owners, the last owner would take possesion, so Lucy and Aly's cat not Lucy's and Aly's cat.
如果某件物品有多个所有者，要在最后一个所有者那里添加所有格形式，所以露西和爱丽的猫要写成Lucy and Aly's cat 而不是Lucy's and Aly's cat。
But if the noun is owned separately it would be Lucy's and Aly's cats.
但如果物品是分开所有的，就要写成Lucy's and Aly's cats（露西和爱丽的猫咪们）。
Verb contractions, which are sometimes called 'short forms', commonly combine a pronoun or noun and a verb, or a verb and not, in a shorter form.
The first use produces words such as 'she'll', which combines the noun 'she' with 'will', used to express the future tense.
The second use is seen in words like 'can't' - can and not - or 'wouldn't' - would not.
While they are common in everyday speech, they are frowned upon in formal writing.
These are particularly true of contractions that combine pronouns with 'would' or 'had'.
One might say 'Mum'd' instead of 'Mum would' in informal conversation, for example, but would not write it.
The addition of apostrophes can lead to people becoming mixed-up between homophones - words that have the same pronunciation but different meanings.
One of the most common mistakes is the difference between who's and whose.
'Who's' is a contracted form of 'who is' while 'whose' is the possessive form of the pronoun 'who'.
'You're' and 'your' create similar problems for native and second language English speakers.