| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] n't [verb] | 56974 |
|
| 2 | [modal v] [verb] a | 37973 |
|
| 3 | n't [verb] a | 6940 |
|
| 4 | [modal v] n't a | 35 |
|
