| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] [prep] | 8214 |
|
| 2 | [vb past] [be] [prep] | 4611 |
|
| 3 | which [be] [prep] | 3673 |
|
| 4 | which [vb past] [be] | 2801 |
|
