| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [be] [adv] [verb] | 5643 |
|
| 2 | [pron] [be] [adv] happen | 193 |
|
| 3 | [Wh det] [be] [adv] happen | 116 |
|
| 4 | which [be] [adv] happen | 5 |
|
