第三人称单数 (Present Simple, 3rd Person Singular)

⚠ 注意：以下规则只适用于“一般现在时” (Present Simple)

在其他时态（过去时 / 现在进行时 / 将来时）中，动词形式不同，不需要这个规则。

1. 核心规则 

(1) 主语范围

• 第三人称单数：he / she / it / 单数名词
• 不包括：I / you / we / they

(2) 动词变化 (只在一般现在时)

• 大多数动词 → +s：work → works
• 以 ch/sh/ss/x/o 结尾 → +es：watch → watches, go → goes
• 辅音字母+y → ies：study → studies
• 特殊动词：have → has / do → does

口诀：“一般现在时，he/she/it → 动词+s”

2. 句型中的应用

(1) 肯定句

• She plays the piano every day.

(2) 否定句 (doesn’t + 动词原形)

• She doesn’t play the piano.

(3) 疑问句 (Does + 主语 + 动词原形)

• Does she play the piano?

⚠ 提醒：在 does 后，动词恢复原形，不再加 -s。

3. 注意要点

1. 并列主语不是单数 → My teacher and my friend like music.
2. 集合名词 → The team plays well.
3. 不可数名词 → Money plays an important role.
4. 不定代词 → Everyone likes English.

4. 改错练习

1. He go to the library every day. → He goes to the library every day.
2. The news travel fast. → The news travels fast.
3. My parents lives in Seoul. → My parents live in Seoul.
4. Does she likes K-pop? → Does she like K-pop?

5. 总结 

• 规则只在 一般现在时 中使用
• 口诀：I/You/We/They → 原形；He/She/It → +s
• 否定/疑问 → 用 does → 动词回到原形