| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not a [noun sg] | 7784 |
|
| 2 | [modal v] a [noun sg] | 733 |
|
| 3 | [modal v] not [noun sg] | 136 |
|
| 4 | [modal v] not a | 28 |
|
