| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been [verb] [det] [noun] | 287 |
|
| 2 | [vb -s] been used [verb] [noun] | 35 |
|
| 3 | been used [verb] [det] [noun] | 16 |
|
| 4 | [vb -s] been used [verb] [det] | 8 |
|
