| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pron] [verb] [prep] [be] | 725 |
|
| 2 | [prep] [pron] [vb past] [prep] [be] | 315 |
|
| 3 | [prep] [pron] happen [prep] [be] | 16 |
|
