到底什么时候该大写，看这里就全懂啦

The basic guidelines for using capital letters in English appear simple enough:在英语中使用大写字母的基本准则似乎很简单：

Capitalize the first word in a sentence.句子中的第一个词首字母要大写。

Capitalize the pronoun.代词要大写。

Capitalize proper nouns and most adjectives formed from proper nouns.专有名词和大多数由专有名词构成的形容词要大写。

But things become tricky once we get down to the details. That's when even the most exhaustive style guides (such as the AP Stylebook and The Chicago Manual of Style) occasionally disagree.但一旦我们深入到细节，就会变得很难。即使是最详尽的文体指南（如AP文体手册和芝加哥文体手册）针对大写问题，偶尔也会有不同意见。

In addition, there may be regional disagreements. As Pam Peters has observed, "British writers and editors are more inclined to use capital letters where Americans would dispense with them" (The Cambridge Guide to English Usage).此外，可能存在地区分歧。正如帕姆·彼得斯所观察到的，“英国作家和编辑更倾向于在美国人不使用大写字母的地方使用大写字母”（《剑桥英语使用指南》）。

So don't regard these "rules" as the final word. If your organization has a house-style guide, stay in house. And if you run across a word or phrase not covered by these guidelines, consult a dictionary.所以不要把这些“规则”当作最终定论。如果你的书库里有家庭文体指南，请留在家里。如果你遇到了这些指导方针中没有涉及的单词或短语，请查阅字典。

One final note: in these guidelines capitalize means to use upper case for the first letter of a word.最后一点：在这些指导方针中，大写意味着用大写字母表示单词的第一个字母。

The First Word in a Sentence句子中的第一个单词

Capitalize the first word in a sentence.句子中的第一个词首字母要大写。

Your mother is in here with us, Karras. Would you like to leave a message? (Linda Blair as Regan in The Exorcist, 1973)你妈妈和我们在一起，卡洛斯。你想留言吗？（林达·布莱尔在《驱魔者》中饰演里根，1973年）

Likewise, capitalize the first word of a quotation if it's a complete sentence: Jorge said, "The game is over." But don't capitalize the first word if the quotation is not a complete sentence: Jorge said that the game was "all but over" by the seventh inning.