| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [not/n't] [adv] | 2447 |
|
| 2 | [not/n't] [adv] [subord] | 2413 |
|
| 3 | but [adv] [subord] | 2187 |
|
| 4 | but [not/n't] [subord] | 240 |
|
