| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] which [is] n't | 12 |
|
| 2 | a [noun sg] which [is] n't | 12 |
|
| 3 | a [noun] which is n't | 12 |
|
| 4 | a [noun] which [is] n't | 11 |
|
