| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what happened in the [noun] | 46 |
|
| 2 | [Wh det] happened in the [noun sg] | 37 |
|
| 3 | [Wh det] happened in the past | 11 |
|
| 4 | [Wh det] happened in the past | 11 |
|
| 5 | [Wh det] happened in the [noun pl] | 6 |
|
| 6 | [Wh det] happened in the [noun prp] | 5 |
|
