| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [adv] a | 9730 |
|
| 2 | [conj] not [art] | 3458 |
|
| 3 | [conj] not a | 1323 |
|
| 4 | [conj] [not/n't] a | 1323 |
|
