| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [not/n't] been used [prep] | 12 |
|
| 2 | have [not/n't] [been] used [prep] | 12 |
|
| 3 | have [not/n't] be used [prep] | 12 |
|
| 4 | have not [be] used [prep] | 11 |
|
| 5 | have [not/n't] [be] used in | 6 |
|
