| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [prep] [noun] [prep] | 570 |
|
| 2 | been [v-ing] [prep] [noun] [prep] | 402 |
|
| 3 | had been [v-ing] [prep] [noun] | 400 |
|
| 4 | had been [v-ing] [noun] [prep] | 208 |
|
| 5 | had been [v-ing] [prep] [prep] | 19 |
|
