| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [pron] [vb past] [adv] | 10113 |
|
| 2 | [subord] [pron] [vb past] happen | 133 |
|
| 3 | [pron] [vb past] [adv] happen | 116 |
|
| 4 | [subord] [pron] [adv] happen | 90 |
|
