什么是 both 和 neither？
both 表示“两者都”，用于肯定；neither 表示“两者都不”，用于否定。
⚠️ 注意：both 用于两个人或物，neither 也仅限于两者之间。如果涉及三个或以上，应使用 all / none。
both 的用法
- both + 名词复数：Both books are interesting.
- both of + the/these/my + 名词复数：Both of my parents are doctors.
- both... and...（连接两个成分）：She speaks both English and French.
✅ 正确：Both students passed the exam.
✅ 正确：Both of them like pizza.
❌ 错误：Both three cats are black.（超过两个）
neither 的用法
- neither + 单数名词（但指代两者）：Neither answer is correct.
- neither of + the/these/my + 名词复数：Neither of the options works.
- neither... nor...（连接两个成分）：He likes neither coffee nor tea.
✅ 正确：Neither shirt fits me.
✅ 正确：Neither of my friends came.
❌ 错误：Neither of the five cars is red.（应改用 none）
常见错误对比
| 错误用法 | 正确用法 |
|---|---|
| Both isn’t here. | Neither is here. |
| I like either of them. | I like both of them. / I like neither of them. |
小测验
请选择正确的句子：