| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] not been used [prep] | 19 |
|
| 2 | [vb -s] not be used [prep] | 19 |
|
| 3 | [vb -s] not [been] used [prep] | 19 |
|
| 4 | has not [be] used [prep] | 19 |
|
| 5 | [vb -s] not [be] used [prep] | 14 |
|
| 6 | [vb -s] not [be] used for | 6 |
|
| 7 | [vb -s] n't [be] used [prep] | 5 |
|
