| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [pron] must be [vb pp] | 12 |
|
| 2 | which [pers pn] must be [vb pp] | 11 |
|
| 3 | which it must be [vb pp] | 6 |
|
| 4 | which it must be [vb pp] | 6 |
|
