| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is n't [pron] [pers pn] [vb past] | 16 |
|
| 2 | is n't [Wh det] [pers pn] [vb past] | 13 |
|
| 3 | is n't what [pers pn] [vb past] | 13 |
|
| 4 | is n't what [pers pn] [vb past] | 13 |
|
