| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has be used [prep] a number | 7 |
|
| 2 | has [been] used [prep] a number | 7 |
|
| 3 | has [be] used [prep] a number | 7 |
|
| 4 | has been used [prep] a number | 7 |
|
