| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [prep] a | 665 |
|
| 2 | 'd been [v-ing] [prep] | 338 |
|
| 3 | 'd been [v-ing] a | 46 |
|
| 4 | 'd been [prep] a | 38 |
|
