| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] had [verb] [art] | 834 |
|
| 2 | [Wh det] had [vb pp] [art] | 821 |
|
| 3 | [pron] had happened [art] | 21 |
|
| 4 | [Wh det] [verb] happened [art] | 19 |
|
| 5 | [Wh det] have happened [art] | 19 |
|
| 6 | [Wh det] [vb past] happened [art] | 15 |
|
| 7 | [Wh det] had happen [art] | 15 |
|
