| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] had [verb] [adv] | 865 |
|
| 2 | [Wh pn] had once [verb] | 54 |
|
| 3 | had once [verb] [adv] | 46 |
|
| 4 | [Wh pn] once [verb] [adv] | 11 |
|
| 5 | [Wh pn] had once [adv] | 5 |
|
