| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [is] not [verb] | 39 |
|
| 2 | [vb pp] is [not/n't] [verb] | 38 |
|
| 3 | [vb pp] [is] [not/n't] [vb pp] | 34 |
|
| 4 | [vb pp] [is] [not/n't] known | 11 |
|
| 5 | [vb pp] [is] [not/n't] know | 11 |
|
| 6 | specified [is] [not/n't] [verb] | 7 |
|
