| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] had been on | 9 |
|
| 2 | [Wh det] had be on | 9 |
|
| 3 | [Wh det] had [been] on | 9 |
|
| 4 | which had [be] on | 8 |
|
