| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] had [been] [v-ing] [prep] [det] | 5 |
|
| 2 | who had [be] [v-ing] [prep] [det] | 5 |
|
| 3 | [Wh pn] had [be] [v-ing] [prep] [det] | 5 |
|
| 4 | [Wh pn] had be [v-ing] [prep] [det] | 5 |
|
| 5 | [Wh pn] had been [v-ing] [prep] [det] | 5 |
|
