| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had be set [prep] a | 12 |
|
| 2 | had been set [prep] a | 12 |
|
| 3 | had [been] set [prep] a | 12 |
|
| 4 | had [be] set [prep] a | 11 |
|
