| 知识点（KP） | 南京大学202x | 美国英语新闻 |
| before | 9855.11 | 13751.55 |
| before/avp | 653.86 | 704.36 |
| 副词 before | 920.12 | 873.83 |
| before/c | 2864.86 | 3694.38 |
| before/d | 1085.27 | 997.02 |
| before/lex | 9855.11 | 13751.55 |
| before/p | 5945.42 | 9096.06 |
| before/pos | 9895.55 | 13787.46 |
| before/pp | 1985.18 | 883.72 |
| 介词 before | 3926.54 | 4773.64 |
| before/ske | 30.33 | 3.55 |