| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [pers pn] [vb past] [adv] happen | 6 |
|
| 2 | [vb base] it [vb past] [adv] happen | 6 |
|
| 3 | [vb base] it [vb past] [adv] happen | 6 |
|
| 4 | [vb base] [pron] [vb past] [not/n't] happen | 5 |
|
| 5 | [vb base] [pron] [vb past] [adv] happened | 5 |
|
| 6 | [vb base] [pron] had [adv] happen | 5 |
|
| 7 | [vb base] [pron] [vb past] not happen | 5 |
|
