| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [been] [verb] [prep] a | 14 |
|
| 2 | [prep] [v-ing] [been] [verb] [prep] a | 14 |
|
| 3 | [prep] [v-ing] [been] [verb] by a | 5 |
|
| 4 | [prep] [v-ing] [been] [verb] by a | 5 |
|
