| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [prep] a | 665 |
|
| 2 | [vb infin] been [v-ing] [prep] | 348 |
|
| 3 | [vb infin] [v-ing] [prep] a | 204 |
|
| 4 | [vb infin] been [prep] a | 124 |
|
| 5 | [vb infin] been [v-ing] a | 66 |
|
