| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] had [be] [prep] | 330 |
|
| 2 | had [be] working [prep] | 156 |
|
| 3 | [Wh pn] [be] working [prep] | 142 |
|
| 4 | [Wh pn] had [be] working | 16 |
|
