| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which had been [verb] [prep] | 1315 |
|
| 2 | [pron] had been [v-ing] [prep] | 1015 |
|
| 3 | which [verb] been [v-ing] [prep] | 128 |
|
| 4 | which have been [v-ing] [prep] | 128 |
|
| 5 | which had [been] [v-ing] [prep] | 64 |
|
| 6 | which had been [v-ing] [prep] | 64 |
|
| 7 | which had be [v-ing] [prep] | 64 |
|
| 8 | which had [be] [v-ing] [prep] | 64 |
|
| 9 | which [vb past] been [v-ing] [prep] | 64 |
|
