| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [Wh adv] [pers pn] happened | 13 |
|
| 2 | [is] [Wh adv] it happened | 12 |
|
| 3 | [is] [Wh adv] it happened | 12 |
|
| 4 | [is] how [pron] happened | 9 |
|
| 5 | 's [Wh adv] [pron] happened | 8 |
|
| 6 | is [Wh adv] [pron] happened | 5 |
|
