| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [be] used [prep] [det] [adj] | 6 |
|
| 2 | [vb -s] been used [prep] [det] [adj] | 6 |
|
| 3 | [vb -s] be used [prep] [det] [adj] | 6 |
|
| 4 | [vb -s] [been] used [prep] [det] [adj] | 6 |
|
