| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] had [adv] happened to | 11 |
|
| 2 | [pers pn] had [adv] happen to | 8 |
|
| 3 | it had [adv] happen to | 7 |
|
| 4 | it had [adv] happen to | 7 |
|
| 5 | [pron] had never happen to | 5 |
|
