| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] happened to | 33 |
|
| 2 | had [adv] happen to | 33 |
|
| 3 | [vb past] [adv] happen to | 32 |
|
| 4 | [vb past] [not/n't] happen to | 14 |
|
| 5 | [vb past] not happen to | 14 |
|
| 6 | [vb past] ever happen to | 12 |
|
| 7 | [vb past] ever happen to | 12 |
|
| 8 | did [adv] happen to | 11 |
|
| 9 | [vb past] [adv] happen to | 11 |
|
| 10 | [vb past] n't happen to | 9 |
|
| 11 | [vb past] never happen to | 8 |
|
| 12 | [vb past] never happen to | 8 |
|
| 13 | [vb past] not happen to | 5 |
|
