| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [vb past] once [prep] a | 7 |
|
| 2 | [pron] [vb past] once [prep] a | 7 |
|
| 3 | [pron] [vb past] once [prep] a | 6 |
|
