| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [prep] | 40019 |
|
| 2 | [prep] [v-ing] been | 304 |
|
| 3 | [v-ing] been [prep] | 160 |
|
| 4 | [prep] been [prep] | 48 |
|
