"我和妈妈去超市"写成 Me and mom went，老师就圈起来了。人称代词的主格宾格，一张表就能解决。
主格：当主语，放句首
动作的发出者，用主格：
- I like apples.
- He is tall.
- They are students.
宾格：当宾语，放动词或介词后面
动作的承受者，或者跟在介词后面，用宾格：
- Mom helps me.
- I saw him yesterday.
- Sit beside us.
一张对照表
| 主格 | 宾格 |
|---|---|
| I | me |
| you | you |
| he | him |
| she | her |
| it | it |
| we | us |
| they | them |
礼貌原则：别人在前，我在后
中文说"我和妈妈"，英语反过来：Mom and I（不是 I and Mom）。
- 错：Me and Tom played.
- 对：Tom and I played.
- 错：Between you and I.
- 对：Between you and me.
一句口诀：主格站在动词前，宾格跟在动词后；并列出现礼让三先，别人在前我在后。
