| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [prep] a | 665 |
|
| 2 | [not/n't] [v-ing] [prep] a | 268 |
|
| 3 | [not/n't] been [v-ing] [prep] | 111 |
|
| 4 | [not/n't] been [prep] a | 75 |
|
| 5 | [not/n't] been [v-ing] a | 14 |
|
