冠词:a, an, the

在辅音音素前使用"a",在元音音素前使用"an",当说话者和听者都确切知道你指的是哪个事物时使用"the"。

Examples

• I saw a dog in the park.
• She is an engineer.
• The sun rises in the east.
• He bought an umbrella.
• Can you close the door?

Common Mistakes

Practice

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