| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] had been [v-ing] | 2088 |
|
| 2 | had been [v-ing] [prep] | 1917 |
|
| 3 | [noun] had been [prep] | 1284 |
|
| 4 | [noun] been [v-ing] [prep] | 49 |
|
