| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [prep] a | 665 |
|
| 2 | n't been [v-ing] [prep] | 53 |
|
| 3 | n't been [prep] a | 41 |
|
| 4 | n't [v-ing] [prep] a | 20 |
|
| 5 | n't been [v-ing] a | 7 |
|
