| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [be] [vb pp] at | 462 |
|
| 2 | which [is] [be] [vb pp] | 314 |
|
| 3 | [is] [be] [vb pp] at | 204 |
|
| 4 | which [is] [vb pp] at | 153 |
|
