| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] an [noun] | 4616 |
|
| 2 | [vb base] been [noun] | 940 |
|
| 3 | been an [noun] | 929 |
|
| 4 | [vb base] been an | 68 |
|
