| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have been [verb] an | 17 |
|
| 2 | [noun] [vb base] been [v-ing] an | 10 |
|
| 3 | [noun pl] [vb base] been [verb] an | 10 |
|
| 4 | [noun] [vb base] been [vb pp] an | 7 |
|
