| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which they had be [v-ing] [prep] | 5 |
|
| 2 | which they had [be] [v-ing] [prep] | 5 |
|
| 3 | which they had [been] [v-ing] [prep] | 5 |
|
| 4 | which they had been [v-ing] [prep] | 5 |
|
