| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [vb past] been several [noun] | 5 |
|
| 2 | [vb past] [pron] [vb past] [be] several [noun] | 5 |
|
| 3 | [vb past] [pron] [vb past] [been] several [noun] | 5 |
|
| 4 | [vb past] [pron] [vb past] be several [noun] | 5 |
|
