| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] a [noun] | 34350 |
|
| 2 | [been] a [noun] | 6255 |
|
| 3 | [been] [vb pp] [noun] | 1529 |
|
| 4 | [been] [vb pp] a | 1298 |
|
