选择 A 或 An

使用正确的不定冠词形式——在以辅音音素开头的单词前用“a”，在以元音音素开头的单词前用“an”（例如：a rock、an open box、an hour、a unicorn）

Use the correct form of the indefinite article — 'a' before words beginning with a consonant sound and 'an' before words beginning with a vowel sound (e.g., a rock, an open box, an hour, a unicorn)

学习证据 / Evidence

• 在辅音或元音音素开头的名词前正确选择“a”或“an”（例如：“a ball”、“an egg”、“an umbrella”）
• 将规则应用于拼写和读音不同的难词（例如：“an hour”，因为 /h/ 不发音；“a uniform”，因为 /juː/ 以辅音音素开头）
• 纠正所给句子中 a/an 用法的错误（例如：把“a orange”改为“an orange”）

• Choose 'a' or 'an' correctly before nouns beginning with consonant or vowel sounds (e.g., 'a ball', 'an egg', 'an umbrella')
• Apply the rule to tricky words where spelling and sound differ (e.g., 'an hour' because /h/ is silent, 'a uniform' because /juː/ starts with a consonant sound)
• Correct errors in a/an usage in given sentences (e.g., change 'a orange' to 'an orange')

评估问题 / Assessment

当 {{name}} 写作时，他们是否会自动在辅音音素开头的单词前选择“a”，在元音音素开头的单词前选择“an”——比如“a cat”但“an apple”或“an hour”？

When {{name}} writes, do they automatically choose "a" before a word that starts with a consonant sound and "an" before a vowel sound — like "a cat" but "an apple" or "an hour"?