| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] it had [adv] happen | 5 |
|
| 2 | [vb base] it had [adv] happen | 5 |
|
| 3 | [vb base] [pron] had [adv] happened | 5 |
|
| 4 | [vb base] [pers pn] had [adv] happen | 5 |
|
