When do I need to use an apostrophe?
什么时候用撇号？
The apostrophe is used to express possession.
撇号用来表达所有格。
Before the seventeenth century the apostrophe was rare.
17世纪以前，撇号很少被运用。
I put that word on the page, but he added the apostrophe.
我在纸上写下那个词，但他加了那一撇。
When you contract a word or two words you need to add apostrophe.
当你要缩写一个或者两个词时，你需要加上撇号。
When you contract a word or two words you need to add an apostrophe.
当你要缩写一个或者两个词时，你需要加上撇号。
When you contract a word or two words you need to add an apostrophe.
当你要缩写一个或者两个词时，你需要加上撇号。
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