| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] [det] [noun] | 452 |
|
| 2 | have been used [prep] [noun] | 233 |
|
| 3 | have been used [prep] [det] | 81 |
|
| 4 | been used [prep] [det] [noun] | 67 |
|
| 5 | have used [prep] [det] [noun] | 8 |
|
| 6 | have been used [det] [noun] | 6 |
|
