| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] which [pers pn] must be [vb pp] | 10 |
|
| 2 | [prep] which [pers pn] must be [vb pp] | 10 |
|
| 3 | which [pers pn] [verb] must be [vb pp] | 5 |
|
