| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] never [been] used [prep] | 15 |
|
| 2 | have never [been] used [prep] | 15 |
|
| 3 | [vb -s] never [been] used [prep] | 7 |
|
| 4 | has never [been] used [prep] | 7 |
|
| 5 | [vb past] never [been] used [prep] | 5 |
|
