| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [adv] so | 595 |
|
| 2 | but [adv] [not/n't] | 376 |
|
| 3 | but [not/n't] so | 209 |
|
| 4 | [adv] [not/n't] so | 173 |
|
