| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not have [vb pp] back [prep] | 6 |
|
| 2 | [vb mod] not have [vb pp] back [prep] | 6 |
|
| 3 | [vb mod] not [vb infin] [vb pp] back [prep] | 6 |
|
